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Which statement correctly describes the ability of bases? (Points

Customer Question

Which statement correctly describes the ability of bases? (Points : 4)
release only hydrogen ions
take up only hydrogen ions
release only hydroxide ions
both take up and hydrogen ions and release hydroxide ions
release hydrogen and release hydroxide


2. How do isotopes of an element differ? (Points : 4)
proton number
electron number
neutron number
types of bonds
atomic number


3. Which of the following explains the events occurring when water boils? (Points : 4)
Hydrogen bonds are broken between neighbor water molecules.
Covalent bonds are broken between oxygen and hydrogen atoms.
Ionic bonds are broken when the minerals in water are heated.
The bond between one water molecule and another is strengthened.
The hydrogen atoms break away from the oxygen and escape as vapor.


4. The pH scale is a mathematical indicator of what? (Points : 4)
the concentration of H+ present in a solution
the concentration of OH+ present in a solution
the total amount of all ions in a solution
the ability of a solution to buffer
the ability to dissolve in water


5. How is the atomic number of an element determined? (Points : 4)
Number of protons.
Total of protons and neutrons.
Number of electrons.
Number of electron levels.
Number of neutrons.


6. Which of the following is the smallest unit of matter that has all the properties of an element? (Points : 4)
molecule
element
atom
compound
electron


7. Which of the following is NOT a property of water? (Points : 4)
It is a good solvent.
It is denser when frozen than when liquid.
It is cohesive.
It resists temperature changes.
It can be found as a solid, liquid, or gas.


8. What is important about an atom's outermost electron shell? (Points : 4)
is filled when it has three electrons
determines its chemical reactivity
determines its atomic mass
is filled with positively charged particles.
is filled identically for every element.


9. What category of biological molecules are steroids included in? (Points : 4)
proteins
lipds
carbohydrates
nucleic acids


10. What element do all organic molecules have in common? (Points : 4)
Hydrogen
Carbon
Nitrogen
Oxygen
Phosphorous


11. Glycogen is a _____ made of many ______. (Points : 4)
simple sugar; amino acids
peptide; amino acids
polymer; glucose molecules
protein; fatty acids
nucleic acid; nucleotides


12. A gene in DNA is the code for what? (Points : 4)
a sequence of amino acids
a sequence of glucose molecules
a sequence of fatty acids used in a fat
a sequence of sugars
a sequence of functional groups


13. If a material mixes readily with water it is classified as which of the following? (Points : 4)
dehydrated
hydrophobic
saturated
hydrophilic
salty


14. What is the principle role for sugars in living things? (Points : 4)
to form cell membranes
to serve as a form of energy storage
to create out genetic code
for creating energy
to produce hormones


15. What makes a lipid unsaturated? (Points : 4)
At least on double or triple bond.
All single bonds.
Hydrogens are added.
Short fatty acid chains.


16. Which of the following is a primary function of proteins? (Points : 4)
energy storage
enzymatic activity
genetic coding
energy source
insulation


17. Which of the following is in correct order from smallest to largest? (Points : 4)
protein- amino acid- polypeptide
amino acid-polypeptide- peptide
peptide-polypeptide-protein
protein-glycerol-amino acid
disaccaride-polysaccharide-monosaccharide


18. Which of these things would make you question the validity of a scientific study? (Points : 4)
Study originated from a simple observation.
Hypothesis has never been tested before.
Experiment canot be repeated.
Results published in a journal read only by scientists.
Original hypothesis was rejected.


19. Which of the following correctly lists the classification categories from least to most inclusive? (Points : 4)
kingdom, phylum, domain, class, order, family, genus, species
domain, kingdom, class, order, family, phylum, genus, species
genus, species, family, class, order, domain, phylum, kingdom
species, genus, family, order, class, phylum, kingdom, domain
phylum, species, genus, kingdom, domain, order, class, family


20. To which group to prokaryotes belong? (Points : 4)
Domain Eukarya
Kingdom Plantae
Kingdom Protista
Domain Archaea
Kingdom Animalia


21. Scientists were studying temperature selection among pregnant big brown bats, to see if being pregnant has an effect on the preferred temperature the bats select. What would the control group be in this experiment? (Points : 4)
Pregnant bats
Female bats that were not pregnant.
Pregnant bats kept in higher temperatures.
Male bats
Female bats kept at lower temperatures.


22. Which process transforms solar energy into chemical energy? (Points : 4)
metabolism
homeostasis
respiration
photosynthesis
reproduction


23. According to the Mader text, what is the single most significant bioethical issue that we face today? (Points : 4)
Genetically modified organisms.
Loss of biodiversity
Pollution to air and water.
Carcinogens.


24. What is the smallest unit of life? (Points : 4)
tissue.
organ.
cell.
specie.
organsim.


25. Which statement is true about a theory? (Points : 4)
is tested by an experiment
is more narrow in scope than a hypothesis
encompasses many hypotheses.
cannot be tested
is held to be an absolutely correct answer to a question.
Submitted: 2 years ago.
Category: Homework
Expert:  Angela--Mod replied 2 years ago.
Hi, I’m a moderator for this topic and I wonder whether you’re still waiting for an answer. If you are, please let me know and I will do my best to find an Expert to assist you right away. If not, feel free to let me know and I will cancel this question for you. Thank you!

Customer: replied 2 years ago.
everything is ok, but I need to knowwhere are the answer.
Expert:  Angela--Mod replied 2 years ago.
Sometimes, finding the right Expert can take a little longer than expected and we thank you greatly for your understanding. We’ll be in touch again shortly.
Expert:  Dr. Clark's SCIENCE replied 2 years ago.
Hello, Welcome to JustAnswer, a paid support site. I would be happy to help you with this. EDIT: please see response below; use this to check your answers1. B2. C3. 4. A5. A6. C7.B8.B9.B10.B11.C12.A13.B14.B15.A16.B17.B18.C19. A20. D21. B22. D23. Refer to your text as this is the author's opinion24.C25. CThanks for choosing JustAnswer!
Dr. Clark's SCIENCE, Engineer/Scientist
Category: Homework
Satisfied Customers: 195
Experience: PhD Biomedical Engineering, test prep and homework tutor
Dr. Clark's SCIENCE and 15 other Homework Specialists are ready to help you
Customer: replied 2 years ago.
what about answer 1and 4?
Expert:  Dr. Clark's SCIENCE replied 2 years ago.

1. B

2. C

3. A

4. A

5. A

6. C

7.B

8.B

9.B

10.B

11.C

12.A

13.B

14.B

15.A

16.B

17.B

18.C

19. A

20. D

21. B

22. D

23. Refer to your text as this is the author's opinion

24.C

25. C

 

 

Sorry about the lack of formatting

Customer: replied 2 years ago.
Hi expert, I have one question related with my homework. First, I miss 8 question, but right now I compare with yuor answer and I miss 10. Can you review this homework again?
Expert:  Dr. Clark's SCIENCE replied 2 years ago.
Sure. Can you tell me which ones you have concerns about. I will review them and also give you an explanation. Also, there may be some that can be answered more than one way and your book or teacher has a specific answer they are looking for
Customer: replied 2 years ago.

I think the answer 13, but I don't sure about the others one.

Customer: replied 2 years ago.
Relist: Answer quality.
Expert:  Josie-Mod replied 2 years ago.

Hi, I'm a moderator for this topic and I wonder whether you're still waiting for an answer. If you are, please let me know and I will do my best to find another Expert to assist you right away. If not, feel free to let me know and I will cancel this question for you. Thank you!

Customer: replied 2 years ago.
I want the second opinion because I have some difference between the answer. Please reply me as soon as you can
Customer: replied 2 years ago.
Relist: Other.
I just want a second opinion, but ASAP please
Expert:  Dr. Clark's SCIENCE replied 2 years ago.

My apologies. I was answering from my ipad, and had some difficulties with responding; as you can see my answers all came out in a string. #13 as I gave it to you was definitely incorrect. This time I have bolded the answers. If you are still dissatisfied, I will opt out and try to get another expert to help you with this. Again I apologize for any inconvenience I may have caused.

 

 

Which statement correctly describes the ability of bases? (Points : 4)
release only hydrogen ions
take up only hydrogen ions
release only hydroxide ions
both take up and hydrogen ions and release hydroxide ions
release hydrogen and release hydroxide


2. How do isotopes of an element differ? (Points : 4)
proton number
electron number
neutron number
types of bonds
atomic number


3. Which of the following explains the events occurring when water boils? (Points : 4)
Hydrogen bonds are broken between neighbor water molecules.
Covalent bonds are broken between oxygen and hydrogen atoms.
Ionic bonds are broken when the minerals in water are heated.
The bond between one water molecule and another is strengthened.
The hydrogen atoms break away from the oxygen and escape as vapor.


4. The pH scale is a mathematical indicator of what? (Points : 4)
the concentration of H+ present in a solution
the concentration of OH+ present in a solution
the total amount of all ions in a solution
the ability of a solution to buffer
the ability to dissolve in water


5. How is the atomic number of an element determined? (Points : 4)
Number of protons.
Total of protons and neutrons.
Number of electrons.
Number of electron levels.
Number of neutrons.


6. Which of the following is the smallest unit of matter that has all the properties of an element? (Points : 4)
molecule
element
atom
compound
electron


7. Which of the following is NOT a property of water? (Points : 4)
It is a good solvent.
It is denser when frozen than when liquid.
It is cohesive.
It resists temperature changes.
It can be found as a solid, liquid, or gas.


8. What is important about an atom's outermost electron shell? (Points : 4)
is filled when it has three electrons
determines its chemical reactivity
determines its atomic mass
is filled with positively charged particles.
is filled identically for every element.


9. What category of biological molecules are steroids included in? (Points : 4)
proteins
lipds
carbohydrates
nucleic acids


10. What element do all organic molecules have in common? (Points : 4)
Hydrogen
Carbon
Nitrogen
Oxygen
Phosphorous


11. Glycogen is a _____ made of many ______. (Points : 4)
simple sugar; amino acids
peptide; amino acids
polymer; glucose molecules
protein; fatty acids
nucleic acid; nucleotides


12. A gene in DNA is the code for what? (Points : 4)
a sequence of amino acids
a sequence of glucose molecules
a sequence of fatty acids used in a fat
a sequence of sugars
a sequence of functional groups


13. If a material mixes readily with water it is classified as which of the following? (Points : 4)
dehydrated
hydrophobic
saturated
hydrophilic
salty


14. What is the principle role for sugars in living things? (Points : 4) - sugars are energy storage molecules - monosaccharaides are "ready energy"
to form cell membranes
to serve as a form of energy storage
to create out genetic code
for creating energy
to produce hormones


15. What makes a lipid unsaturated? (Points : 4)
At least on double or triple bond.
All single bonds.
Hydrogens are added.
Short fatty acid chains.


16. Which of the following is a primary function of proteins? (Points : 4)
energy storage
enzymatic activity
genetic coding
energy source
insulation


17. Which of the following is in correct order from smallest to largest? (Points : 4)
protein- amino acid- polypeptide
amino acid-polypeptide- peptide
peptide-polypeptide-protein

protein-glycerol-amino acid
disaccaride-polysaccharide-monosaccharide


18. Which of these things would make you question the validity of a scientific study? (Points : 4)
Study originated from a simple observation.
Hypothesis has never been tested before.
Experiment canot be repeated.
Results published in a journal read only by scientists.
Original hypothesis was rejected.


19. Which of the following correctly lists the classification categories from least to most inclusive? (Points : 4)
kingdom, phylum, domain, class, order, family, genus, species
domain, kingdom, class, order, family, phylum, genus, species
genus, species, family, class, order, domain, phylum, kingdom
species, genus, family, order, class, phylum, kingdom, domain
phylum, species, genus, kingdom, domain, order, class, family


20. To which group to prokaryotes belong? (Points : 4)
Domain Eukarya
Kingdom Plantae
Kingdom Protista
Domain Archaea
Kingdom Animalia


21. Scientists were studying temperature selection among pregnant big brown bats, to see if being pregnant has an effect on the preferred temperature the bats select. What would the control group be in this experiment? (Points : 4)
Pregnant bats
Female bats that were not pregnant.
Pregnant bats kept in higher temperatures.
Male bats
Female bats kept at lower temperatures.


22. Which process transforms solar energy into chemical energy? (Points : 4)
metabolism
homeostasis
respiration
photosynthesis
reproduction


23. According to the Mader text, what is the single most significant bioethical issue that we face today? (Points : 4)
Genetically modified organisms.
Loss of biodiversity - (my best guess without having the book)
Pollution to air and water.
Carcinogens.


24. What is the smallest unit of life? (Points : 4)
tissue.
organ.
cell.
specie.
organsim.


25. Which statement is true about a theory? (Points : 4)
is tested by an experiment
is more narrow in scope than a hypothesis
encompasses many hypotheses.
cannot be tested
is held to be an absolutely correct answer to a question.

Customer: replied 2 years ago.

1.

Question :

Which of the following statements is correct regarding the events of the cell cycle?

Student Answer:

DNA is duplicated during the G1 and G2 phases

DNA replicates during cytokinesis.

Interphase consists of G1, S, and G2.

The M phase is usually the longest phase.

The cell stops growing in G2 phase.

2.

Question :

When a eukaryotic cell is not undergoing cell division what form is it's DNA in?

Student Answer:

Chromatin wound around histones.

Sister chromatids attached by a centromere.

Compacted into chromosomes.

Formed into tetrads.

 

 

3.

Question :

Susan was examining a cell under the microscope and noticed the formation of a cell plate in the midline of the cell and the formation of nuclei at opposite poles of the cell. What kind of cell is she viewing?

Student Answer:

animal cell in the G1 phase of the cell cycle

dividing bacterial cell

plant cell undergoing cytokinesis

animal cell undergoing cytokinesis

plant cell in the prophase stage

 

4.

Question :

Cancer is a disorder in which some cells have lost what ability?

Student Answer:

To reproduce.

To produce spindle fibers

To control growth rate

To communicate with other cells.

To regulate cell volume

 

5.

Question :

How do the daughter cells at the end of mitosis and cytokinesis compare to their parent cell when it was in G1 of the cell cycle?

Student Answer:

The daughter cells have the same number of chromosomes and twice the amount of DNA.

The daughter cells have the same number of chromosomes and the same amount of DNA.

The daughter cells have the same number of chromosomes and half the amount of DNA.

The daughter cells have half the number of chromosomes and half the amount of DNA.

The daughter cells have half of the amount of cytoplasm and half the amount of DNA.

 

6.

Question :

When the telomeres of chromosomes of a normal adult cell become too short, what happens to the cell?

Student Answer:

DNA is repaired by telomerase

Cell undergoes metastasis and moves away.

Cell begins to reproduce rapidly.

Programmed cell death by apoptosis.

Cell loses ability to function.

 

7.

Question :

Which of the following statements about mitosis is NOT true?

Student Answer:

The cells arising from the process have half of the original genetic material.

The cells arising from the process are genetically identical.

the process of cytokinesis occurs simultaneously with the end of mitosis.

Spindle fibers are involved in the movement of chromosomes.

Both sexually and asexually reproducing organisms utilize the process of mitosis.

 

8.

Question :

What do we call the proteins that are involved in the regulation of the cell cycle, and that show fluctuation in concentration during the cell cycle?

Student Answer:

centromeres

kinetochores

centrioles

cyclins

proton pumps

 

9.

Question :

Which of the following statements about mitosis and meiosis is correct?

Student Answer:

Meiosis involves 2 divisions and produces 4 non-identical daughter nuclei.

Meiosis involves 1 division and produces 2 non-identical daughter nuclei.

Mitosis involves 1 division and produces 2 non-identical daughter nuclei.

Mitosis involves 2 divisions and produces 4 identical daughter nuclei.

Meiosis involves 2 divisions and produces 4 identical daughter nuclei.

 

10.

Question :

What is a tetrad?

Student Answer:

two chromosomes with two sister chromatids each.

two sister chromatids with separate centromeres.

four chromosomes with two sister chromatids each.

four sister chromatids with a common centromere.

four sister chromatids attached at a common centromere.

 

11.

Question :

How does the process of meiosis I differ from meiosis II?

Student Answer:

crossing over occurs in prophase of meiosis I but not in prophase of meiosis II.

sister chromatids are separated during meiosis I while homologous chromosomes are separated during meiosis II

the resulting cells at the end of meiosis I are diploid while the cells at the end of meiosis II are haploid.

in telophase of meiosis I four daughter cells form from the parent cell and in telophase of meiosis II each parent cells gives rise to two daughter cells.

in meiosis I there is no pairing of chromosomes while homologues pair in meiosis II.

 

12.

Question :

What will result if a human egg with 22 chromosomes is fertilized by a normal sperm?

Student Answer:

a zygote with trisomy.

a zygote with disomy.

a zygote with monosomy.

a zygote with normal chromosome number.

cell death or loss of control of cell cycle.

 

13.

Question :

What is the normal complement of sex chromosomes for a human male?

Student Answer:

YY

XX

XO

XXY

XY

 

14.

Question :

In what way is mitosis different from meiosis?

Student Answer:

Mitosis involves division of the nucleus while meiosis is division of the cytoplasm.

Cytokinesis occurs with mitosis but not with meiosis.

Mitosis results in cells with identical DNA while meiosis yields cells with varied DNA combinations.

Mitosis occurs in all cells while meiosis occurs only in somatic cells.

They are the same except mitosis has one division while meiosis has 2.

 

15.

Question :

What is the result when a set of homologs does not separate in meiosis I?

Student Answer:

Nondisjunction

Diploid gametes.

Translocation.

Mutation.

Cells with multiple nuclei.

 

16.

Question :

Following meiosis I, the daughter cells are ______; following meiosis II, the daughter cells are ______; and following mitosis, the daughter cells are _______.

Student Answer:

diploid; haploid; diploid

diploid; diploid; haploid

haploid; haploid; diploid

haploid; haploid; haploid

diploid; diploid; diploid

 

 

17.

Question :

How many pairs of chromosomes are found in a normal human cell?

Student Answer:

23

46

92

12

2

 

18.

Question :

Which of the following is NOT true with regard to the law of segregation?

Student Answer:

Each individual has 2 factors for each trait.

Genes segregate during gamete formation.

Gametes contain only 1 gene from each pair.

During fertilization, each new individual obtains 2 genes for each trait.

Each gamete contains 2 genes for each trait.

 

19.

Question :

Parents with the dominant phenotype cannot have offspring with the recessive phenotype.

Student Answer:

True because the dominant gene must be passed down from each parent.

True because at least one dominant gene will be passed down from each parent.

False because one parent could carry the recessive allele.

False because both parents could carry the recessive allele.

True because both parents have the dominant allele.

 

20.

Question :

What is the phenotype of a black rabbit whose complement of alleles for the trait is Bb?

Student Answer:

black

heterozygous

Bb

homozygous dominant

impossible to determine

 

21.

Question :

Skin color is coded for by several different genes which results in a range of skin colors from very dark to very light. This is an example of what type of inheritance?

Student Answer:

polygenic

pleiotropy

codominance

incomplete dominance

the rule of multiplication

 

22.

Question :

Morgan breeds and sells snakes. He knows that he can make the most money by breeding and selling albino snakes. Albinism is a recessive trait. His female albino corn snake just produced 6 offspring. Two displayed normal coloration and 4 were albino. What do you know about the genotype of the baby snakes with the normal coloration?

Student Answer:

They must be homozygous dominant.

They must be homozygous recessive.

They must be heterozygous.

They could be either heterozygous or homozygous dominant.

There is not enough information to determine their genotype

 

23.

Question :

What term is used to refer to an individual who is carrying two identical alleles of the same gene?

Student Answer:

dominant.

heterozygous.

homozygous.

zygotes.

codominant

 

24.

Question :

What are linked alleles?

Student Answer:

Genes on homologous chromosomes.

Traits with similar effects.

Genes that are very close together in location on a chromosome.

Alleles inherited on the sex chromosomes.

Genes that tend to code for the same traits.

 

25.

Question :

A woman carries a sex-linked gene for a disorder. Her husband is normal. What can you determine about their children?

Student Answer:

All sons will have the disorder.

All daughters will be carriers.

None of the children will inherit the disorder.

50% chance of any child having the disorder.

None of the daughters will have the disorder

Expert:  Dr. Clark's SCIENCE replied 2 years ago.

Thanks for the request. Please find answer below to use as a guide.

 

1.

Question :

Which of the following statements is correct regarding the events of the cell cycle?

Student Answer:

DNA is duplicated during the G1 and G2 phases

DNA replicates during cytokinesis.

Interphase consists of G1, S, and G2.

The M phase is usually the longest phase.

The cell stops growing in G2 phase.

2.

Question :

When a eukaryotic cell is not undergoing cell division what form is it's DNA in?

Student Answer:

Chromatin wound around histones.

Sister chromatids attached by a centromere.

Compacted into chromosomes.

Formed into tetrads.

 

3.

Question :

Susan was examining a cell under the microscope and noticed the formation of a cell plate in the midline of the cell and the formation of nuclei at opposite poles of the cell. What kind of cell is she viewing?

Student Answer:

animal cell in the G1 phase of the cell cycle

dividing bacterial cell

plant cell undergoing cytokinesis

animal cell undergoing cytokinesis

plant cell in the prophase stage

 

4.

Question :

Cancer is a disorder in which some cells have lost what ability?

Student Answer:

To reproduce.

To produce spindle fibers

To control growth rate

To communicate with other cells.

To regulate cell volume

 

5.

Question :

How do the daughter cells at the end of mitosis and cytokinesis compare to their parent cell when it was in G1 of the cell cycle?

Student Answer:

The daughter cells have the same number of chromosomes and twice the amount of DNA.

The daughter cells have the same number of chromosomes and the same amount of DNA.

The daughter cells have the same number of chromosomes and half the amount of DNA.

The daughter cells have half the number of chromosomes and half the amount of DNA.

The daughter cells have half of the amount of cytoplasm and half the amount of DNA.

 

6.

Question :

When the telomeres of chromosomes of a normal adult cell become too short, what happens to the cell?

Student Answer:

DNA is repaired by telomerase

Cell undergoes metastasis and moves away.

Cell begins to reproduce rapidly.

Programmed cell death by apoptosis.

Cell loses ability to function.

 

7.

Question :

Which of the following statements about mitosis is NOT true?

Student Answer:

 

The cells arising from the process have half of the original genetic material.

The cells arising from the process are genetically identical.

the process of cytokinesis occurs simultaneously with the end of mitosis.

Spindle fibers are involved in the movement of chromosomes.

Both sexually and asexually reproducing organisms utilize the process of mitosis.

 

8.

Question :

What do we call the proteins that are involved in the regulation of the cell cycle, and that show fluctuation in concentration during the cell cycle?

Student Answer:

centromeres

kinetochores

centrioles

cyclins

proton pumps

 

9.

Question :

Which of the following statements about mitosis and meiosis is correct?

Student Answer:

Meiosis involves 2 divisions and produces 4 non-identical daughter nuclei.

Meiosis involves 1 division and produces 2 non-identical daughter nuclei.

Mitosis involves 1 division and produces 2 non-identical daughter nuclei.

Mitosis involves 2 divisions and produces 4 identical daughter nuclei.

Meiosis involves 2 divisions and produces 4 identical daughter nuclei.

 

10.

Question :

What is a tetrad?

Student Answer:

two chromosomes with two sister chromatids each.

two sister chromatids with separate centromeres.

four chromosomes with two sister chromatids each.

four sister chromatids with a common centromere.

four sister chromatids attached at a common centromere.

 

11.

Question :

How does the process of meiosis I differ from meiosis II?

Student Answer:

crossing over occurs in prophase of meiosis I but not in prophase of meiosis II.

sister chromatids are separated during meiosis I while homologous chromosomes are separated during meiosis II

the resulting cells at the end of meiosis I are diploid while the cells at the end of meiosis II are haploid.

in telophase of meiosis I four daughter cells form from the parent cell and in telophase of meiosis II each parent cells gives rise to two daughter cells.

in meiosis I there is no pairing of chromosomes while homologues pair in meiosis II.

 

12.

Question :

What will result if a human egg with 22 chromosomes is fertilized by a normal sperm?

Student Answer:

a zygote with trisomy.

a zygote with disomy.

a zygote with monosomy.

a zygote with normal chromosome number.

cell death or loss of control of cell cycle.

 

13.

Question :

What is the normal complement of sex chromosomes for a human male?

Student Answer:

YY

XX

XO

XXY

XY

 

14.

Question :

In what way is mitosis different from meiosis?

Student Answer:

Mitosis involves division of the nucleus while meiosis is division of the cytoplasm.

Cytokinesis occurs with mitosis but not with meiosis.

Mitosis results in cells with identical DNA while meiosis yields cells with varied DNA combinations.

Mitosis occurs in all cells while meiosis occurs only in somatic cells.

They are the same except mitosis has one division while meiosis has 2.

 

15.

Question :

What is the result when a set of homologs does not separate in meiosis I?

Student Answer:

Nondisjunction

Diploid gametes.

Translocation.

Mutation.

Cells with multiple nuclei.

 

16.

Question :

Following meiosis I, the daughter cells are ______; following meiosis II, the daughter cells are ______; and following mitosis, the daughter cells are _______.

Student Answer:

diploid; haploid; diploid

diploid; diploid; haploid

haploid; haploid; diploid

haploid; haploid; haploid

diploid; diploid; diploid

 

17.

Question :

How many pairs of chromosomes are found in a normal human cell?

Student Answer:

23

46

92

12

2

 

18.

Question :

Which of the following is NOT true with regard to the law of segregation?

Student Answer:

Each individual has 2 factors for each trait.

Genes segregate during gamete formation.

Gametes contain only 1 gene from each pair.

During fertilization, each new individual obtains 2 genes for each trait.

Each gamete contains 2 genes for each trait.

 

19.

Question :

Parents with the dominant phenotype cannot have offspring with the recessive phenotype.

Student Answer:

True because the dominant gene must be passed down from each parent.

True because at least one dominant gene will be passed down from each parent.

False because one parent could carry the recessive allele.

False because both parents could carry the recessive allele.

True because both parents have the dominant allele.

 

20.

Question :

What is the phenotype of a black rabbit whose complement of alleles for the trait is Bb?

Student Answer:

black

heterozygous

Bb

homozygous dominant

impossible to determine

 

21.

Question :

Skin color is coded for by several different genes which results in a range of skin colors from very dark to very light. This is an example of what type of inheritance?

Student Answer:

polygenic

pleiotropy

codominance

incomplete dominance

the rule of multiplication

 

22.

Question :

Morgan breeds and sells snakes. He knows that he can make the most money by breeding and selling albino snakes. Albinism is a recessive trait. His female albino corn snake just produced 6 offspring. Two displayed normal coloration and 4 were albino. What do you know about the genotype of the baby snakes with the normal coloration?

Student Answer:

They must be homozygous dominant.

They must be homozygous recessive.

They must be heterozygous.

They could be either heterozygous or homozygous dominant.

There is not enough information to determine their genotype

 

23.

Question :

What term is used to refer to an individual who is carrying two identical alleles of the same gene?

Student Answer:

dominant.

heterozygous.

homozygous.

zygotes.

codominant

 

24.

Question :

What are linked alleles?

Student Answer:

Genes on homologous chromosomes.

Traits with similar effects.

Genes that are very close together in location on a chromosome.

Alleles inherited on the sex chromosomes.

Genes that tend to code for the same traits.

 

25.

Question :

A woman carries a sex-linked gene for a disorder. Her husband is normal. What can you determine about their children?

Student Answer:

All sons will have the disorder.

All daughters will be carriers.

None of the children will inherit the disorder.

50% chance of any child having the disorder.

None of the daughters will have the disorder

 

 

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Dr. Clark's SCIENCE, Engineer/Scientist
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Customer: replied 2 years ago.

What term is used to refer to a testable explanation of a broad range of related phenomena that is relied upon by scientists with a high degree of confidence? (Points : 5)
an act
a law
a theory
a dogma

 

2. What are the smaller unit molecules (monomers) which combine to form proteins and polypeptides called? (Points : 5)
fatty acids
monosaccharides
amino acids
nucleotides

 

3. Enzymes, some hormones, and structural molecules like keratin and collagen are examples of what kind of molecule? (Points : 5)
nucleic acids
carbohydrates
lipids
proteins

 

4. What term is used to refer to an atom that has gained or lost electrons ? (Points : 5)
an ion
a molecule
an isotope
an element

 

5. What is the best way to describe the structure of cell membranes? (Points : 5)
a complex carbohydrate webbing
a flexible sheet of protein
a network of microfilaments and microtubules
a double layer of phospholipids

 

6. Which of the following transport mechanisms requires ATP to move materials across a plasma membrane? (Points : 5)
simple diffusion
facilitated diffusion
osmosis
active transport

 

7. A cell is placed in a solution. If the cell is observed to shrink, the solution must be _________________ relative to the interior of the cell. (Points : 5)
hypertonic
hypotonic
isotonic
toxic

 

8. Consider the following two statements:

(1) " Energy can neither be created nor destroyed, but it can be changed in form."

(2) "If energy changes form, the change is never 100% efficient."
What generalization can be made about these two statements?

(Points : 5)
These statements are expressions of the 1st and 2nd energy laws.
These statements don't apply to any cells.
These statements are both false.
These statements apply only to eukaryotic (higher) cells.

 

9. What term is applied to the part of an enzyme that "fits" its substrate? (Points : 5)
repressor
promoter
active site
operator

 

10. In higher cells, where is cellular (aerobic) respiration with production of adenosine triphosphate (ATP) is carried out? (Points : 5)
mitochondrion
nucleus
plasma membrane
endoplasmic reticulum

 

11. In what way does meiosis differ from mitosis ? (Points : 5)
meiosis results in diploid daughter cells
meiosis involves two cell divisions
DNA replicates before the start of meiosis
meiosis occurs all over the human body

 

12. What causes leaves to appear green? (Points : 5)
carotenoids absorb green light
carotenoids reflect green light
chlorophylls a and b absorb green light
chlorophylls a and b reflect green light

 

13. Many human traits such as eye color and height are controlled by what type of inheritance? (Points : 5)
sex-linked inheritance
Mendel's laws
polygenic inheritance
incomplete dominance

 

14. Which nucleic acid base is found in ribonucleic acid (RNA) but not in deoxyribonucleic acid (DNA)? (Points : 5)
Thymine (T)
Guanine (G)
Cytosine (C)
Uracil (U)

 

15. Which of the following is not a possible outcome of recombinant deoxyribonucleic acid (rDNA) technology? (Points : 5)
mass production of human hormones by bacteria
estimating the age of a rock sample
increasing the production of hardier crops
correcting a human disease

 

16. What is the polymerase chain reaction (PCR) method used for? (Points : 5)
mass-producing proteins
speeding up the production of mRNA proteins
making multiple identical copies of small amounts of DNA
decoding the nucleotide sequence of a gene

 

17. Which of the following is most likely to cause a cell to become cancerous? (Points : 5)
mutation of a tumor supressor gene
premature apoptosis
cytokinesis
contact inhibition

 

18. What is the normal complement of sex chromosomes for a human male ? (Points : 5)
YY
XY
XX
XXY

 

19. What is an allele? (Points : 5)
an alternate form of a gene
a gene found on different chromosomes (e.g., on chromosome numbers 1 and 5)
a gene located at two different positions on the same chromosome
a sex cell

 

20. What do we call a visual display of metaphase chromosomes arranged by size, shape, and banding pattern? (Points : 5)
a genetic disorder
a centrosome
a karyotype
amniocentesis

 

Customer: replied 2 years ago.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Expert:  Dr. Clark's SCIENCE replied 2 years ago.
I'd be happy to assist, but you have not accepted the last response. Were you satisfied with those answers?
Expert:  Dr. Clark's SCIENCE replied 2 years ago.
THIS ANSWER IS LOCKED!
You can view this answer by clicking here to Register or Login and paying $3.
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Customer: replied 2 years ago.
Which statement is true regarding ribosomal RNA? (Points : 4)
covalently binds amino acids.
contains an anticodon.
is produced in the nucleolus of the nucleus.
assists in DNA replication.
has no known function in the cell.

2. In a DNA molecule, the two strands are covalently bonded to each other. (Points : 4)
True
False

3. During the process of DNA replication, which of these things occurs? (Points : 4)
Only one strand of the parent DNA is copied.
Neither strand of parent DNA appears in daughter DNA.
Ribosomes make new DNA.
the strands of parent DNA are unwound.
Complementary nucleotides are positioned by the enzyme helicase.

4. There is at least one transfer (tRNA) molecule for each of the twenty amino acids. (Points : 4)
True
False

5. A tiny spot of blood was found on a glove at a crime scene. What method of DNA technology would you use to make more copies of the DNA sample left at the scene? (Points : 4)
DNA fingerprinting
recombinant DNA
mutagenesis
PCR
transgenics

6. Which of the following is matched correctly? (Points : 4)
DNA fingerprinting--uses any human cell
polymerase chain reaction--makes use of the noncoding sections of DNA.
DNA ligase--makes many copies of a segment of DNA.
point mutation--addition of a nucleotide base to DNA.
recombinant DNA--contains DNA from two or more different sources.

7. If the codon of an mRNA strand is UGC, the anticodon of the tRNA would be ___________ and the amino acid, ____________, will be added to the growing peptide chain. (Points : 4)
UGC; cysteine
GCA; glutamine
TCG; none, this is stop
AGC; serine
ACG; threonine

8. What is the result when a nucleotide is removed from from a gene in the DNA? (Points : 4)
point mutation
mutagen
transposon
frameshift mutation
nondisjunction

9. Which of the following is not true of cancer cells? (Points : 4)
They show a high degree of contact inhibition.
They do not undergo apoptosis.
They release a growth factor that stimulates angiogenesis.
They produce enzymes.
Their chromosomes are abnormal.

10. Which of the following is true regarding the control of gene expression in eukaryotes? (Points : 4)
Control occurs exclusively at the level of transcription.
mRNA must be translated immediately upon arrival at the ribosomes or it is degraded.
A DNA region of active gene expression is called unpacked genes.
Control of gene expression accounts for cell specialization.
Transcription activators are RNA binding proteins that speed up transcription.

11. Which of the following is not a suspected cause of cancer? (Points : 4)
virsues
mutations
inherited genes
angiogensis
oncogenes

12. What are proto-oncogenes? (Points : 4)
Genes that promote apoptosis.
Genes that code for proteins that inhibit the cell cycle.
Genes that may code for growth factors.
Genes that become tumor-suppressor genes when they mutate.
The result of an oncogene which has mutated.

13. In a normal cell, Ras is a continuously active protein that functions in signaling pathways, several of which promote the cell cycle. (Points : 4)
True
False

14. What is telomerase? (Points : 4)
An enzyme that degrades chromosomes.
A protein found in all adult cells.
Highly active enzyme in cancer cells.
An enzyme that inhibits DNA replication.
A particular DNA sequence on the ends of chromosomes.

15. In prokaryotes, lactose metabolizing enzymes are produced when RNA polymerase binds to the operator on the lac operon in the absence of lactose. (Points : 4)
True
False

16. Euchromatin, areas of active gene expression in eukaryotes, can only become genetically active when histone proteins are physically moved. (Points : 4)
True
False

17. Cloning is a natural process for some organisms. (Points : 4)
True
False

18. What term is applied to an exchange of chromosomal segments between two nonhomologous chromosomes? (Points : 4)
deletion.
reciprocation.
duplication.
translocation.
inversion.

19. The insertion of genetic material into human cells for treatment of a disorder is called what? (Points : 4)
translocation.
amniocentesis.
CVS.
gene therapy.
deletion.

20. Which statement about genetic profiles is true? (Points : 4)
can detect mutations in a person's genes.
is only obtained by taking a blood sample from an individual.
can not be done with accuracy with today's technology.
is illegal in the United States.
is not helpful in determining mutations associated with disease risk.

21. What do we call an abnormality in DNA sequence that is used in a test to determine an abnormal allele? (Points : 4)
histone.
DNA chip.
genetic marker.
DA probe.
restriction fragment.

22. Chorionic villi sampling (CVS) is a much safer procedure than amniocentesis because CVS is done later in pregnancy. (Points : 4)
True
False

23. What is the difference between ex vivo gene therapy and in vivo gene therapy? (Points : 4)
in ex vivo gene therapy, the gene is delivered directly into the body.
in in vivo gene therapy, the gene is inserted into cells that have been removed and are returned to the body after the manipulation.
in ex vivo gene therapy, the gene is inserted into the cells that have been removed and are returned to the body after the manipulation.
in vivo and ex vivo gene therapy are the same procedures.
ex vivo gene therapy uses bone marrow stem cells and in vivo does not.

24. A male has a particular X-linked recessive genetic disorder. His partner is normal, but her father had the disorder. What is the chance that their sons will have the disorder? (Points : 4)
0%
25%
50%
100%
Impossible to determine from the information given.

25. Which disorders are present only in males and are passed from father to all sons, but never to daughters? (Points : 4)
X-linked disorders
X-linked recessive disorders
X-linked dominant disorders
Y-linked disorders
autosomal dominant disorders
Expert:  Dr. Clark's SCIENCE replied 2 years ago.
Please let me know if my work is helpful, as you did not accept the previous response. I have no way of knowing unless you either accept or ask for some sort of clarification. Otherwise your intent for asking for assistance is unclear.

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