1. Which of the following is a characteristic of cancer cells?
A. They can't travel to other parts of the body.
B. They result in uncontrolled growth.
C. They're usually either nerve cells or cardiac muscle cells.
D. They have a specialized structure and function.
2. The two types of cell cycle genes that, if mutated, cause cancer cells to divide uncontrollably are called tumour suppressor genes and
A. growth factors.
D. cancer genes.
3. Which one of the following phrases best describes the human karyotype?
A. Sex chromosomes along with 23 pairs of autosomes
B. One pair of sex chromosomes and 22 pairs of autosomes
C. 46 pairs of autosomes
D. X and Y chromosomes and 22 pairs of autosomes
4. Which one of the following statements about mitosis is correct? A. It consists of two parts: mitosis I and mitosis II.
B. It forms two identical daughter cells.
C. It's part of the process of oogenesis.
D. It creates haploid nuclei.
5. When you notice that someone has unusually blue eyes, you've noticed their
6. Crossing-over involves the exchange of genetic information between
B. sex chromosomes.
D. sister chromatids.
7. Which of these is true of meiosis?
A. n → 2n
B. n → n
C. 2n → n
D. 2n → 2n
8. A parent with type AB blood could not produce a child with type A. B.
9. A woman who isn't colorblind but has an allele for color blindness reproduces with a man who has normal vision. What is the chance that they'll have a colorblind daughter?
10. Autosomes are _______ chromosomes.
11. Which of the following is an example of an X-linked recessive disorder?
B. Color blindness
C. Huntington disease
D. Sickle cell disease
12. If a cell has 18 chromosomes, how many chromosomes would each daughter cell have after mitosis?
B. The number can't be determined.
13. _______ have the potential to develop and specialize into any cell type, which means they're End of exam
A. adult stem cells; multipotent.
B. embryonic stem cells; multipotent.
C. adult stem cells; totipotent.
D. embryonic stem cells; totipotent.
14. Which of these is happening when translation takes place?
A. rRNAs expose their anticodons.
B. DNA is being replicated.
C. tRNAs are bringing amino acids to the ribosomes.
D. mRNA is still in the nucleus.
15. The goal of _______ is to use cells and tissues to treat human illnesses or injuries.
A. therapeutic cloning
B. gene therapy
C. clone therapy
D. reproductive cloning
1.Which of the following is true about bases?
A.They tend to decrease the pH of a solution.
B.They have a sharp or sour taste.
C.They release hydroxide ions in solution.
D.They help to build up cells.
2.Which one of the following occurs during the light reactions of photosynthesis?
B.Reduction of carbon dioxide
C.Carbon dioxide fixation
3.Any energy transformation involves the loss of some energy as
4.Which of the following organelles is part of the endomembrane system?
5.The structure that surrounds the cytoplasm in a bacterial cell is the
6.When a scientific experiment is carried out in a controlled setting, all variables are kept the same except
for the _______ variable.
7.Which of the following is an important property of water?
A.Water temperature rises and falls quickly.
B.Water is a good solvent.
C.Water lacks cohesive properties.
D.Water easily changes from liquid to gas.
8.An insect is able to walk across the surface of a pond without sinking because of the
A.adhesion of the insect's feet to the surface of the water.
B.polarity of the water molecules.
C.process of evaporation.
D.surface tension of the water.
9.As an enzyme fits into a substrate at the active site, it undergoes a slight change to fit into the substrate.
This process is defined by a concept known as the
A.facilitated diffusion process.
B.induced fit model.
C.feedback inhibition model.
D.active enzyme inhibition scheme.
10.In a eukaryotic cell, protein synthesis occurs in the
C.smooth endoplasmic reticulum.
11.Sunflowers belong to which of the following kingdoms?
12.Nucleic acids are composed of monomers called
13.All of the rabbits, deer, and several bird species found within a field are considered to be part of a/an
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14.Select the largest, most inclusive biological level from the following choices.
15.Which one of the following is an example of a monosaccharide?
1.Which one of the following statements presents a condition of the Hardy-Weinberg principle?
A.Genetic drift occurs.
B.Random mating occurs.
C.Gene flow is present.
D.Mutations are present.
2.According to the theory of evolution, birds' feathers evolved from
3.In evolution, the study of vertebrate forelimbs is related to _______ evidence.
4.Which of the following is not an example of a service provided by beneficial bacteria?
5.The distinction between protostomes and deuterostomes is based on differences in their
6.Which of the following is inaccurate in relation to viruses?
A.They reproduce independently.
B.They have nucleic acid core.
C.They feature a capsid.
D.They seek a specific host.
7.Which one of the following statements describes a characteristic of amoeboids?
A.They always live in fresh water.
B.They never have a shell.
D.They have pseudopods.
8._______ is/are the raw material of evolutionary change.
9.Organisms that can interbreed and bear fertile offspring are considered to be in the same
10.Annelids are to lophotrochozoans as _______ are to ecdysozoans.
11.During the life cycle of a plant, gametophyte is to n as sporophyte is to
B.n → 2
12.Which of the following is not a form of genetic recombination in bacteria?
13.Both insects and roundworms exhibit ______, whereas sponges, snails, and leeches do not.
B.calcium carbonate shells
D.molting during growth
14.You have a chart that illustrates a series of species with their common ancestor. This chart is a
15.Which of the following is not a characteristic of Arthropods that has attributed to their diversity and
A.Highly developed nervous system
1.In the context of vision, the blind spot is
A.a nontransparent areas on the cornea.
B.an area of the retina where rods and cones are concentrated.
C.a nontransparent area on the lens.
D.an area of the retina where there are no rods or cones.
2.Which one of the following components makes up the largest portion of plasma?
3.Which one of the following events occurs first in a nerve impulse?
A.Sodium ions move to the inside of a neuron.
B.Potassium ions move to the outside of a neuron.
C.Sodium ions move to the outside of a neuron.
D.Potassium ions move to the inside of a neuron.
4.Which of the following best states the purpose of villi?
A.Increase the synthesis of enzymes
B.Speed up the loss of water from the body
C.Speed up the elimination of wastes
D.Increase surface area for purposes of absorption
5.Cells with similar structures and functions work together to form
6.Which one of the following statements is true regarding voluntary and involuntary responses?
A.Involuntary responses may include the spinal cord and not the brain.
B. Voluntary responses originate in the sensory receptors.
C.Voluntary responses control the activity of glands.
D.Involuntary responses are part of the autonomic system.
7.Which one of the following nutrients is not a source of energy for the body?
8.During development, an embryo is embedded in the
9.In the process of embryonic development, the _______ develops first.
10.How many cotyledons would be found in a flowering plant with nine petals on each flower and long leaves with parallel leaf veins?
11.Annual rings in woody stems are caused by an increase in rings of the
12.Which one of the following statements accurately describes a characteristic of red blood cells?
A.They're convex disks with a large nucleus.
B.They lack hemoglobin.
C.They're agents of inflammation.
D.They transport oxygen to all the cells of the body.
13.What happens when the lungs recoil?
A.Ribs and diaphragm muscles contract.
B.Internal respiration occurs.
14.Jenna says that an example of homeostasis is when body temperature is maintained at about 37° C.
Allen says homeostasis is when breathing rate increases along with exercise. Who is correct?
A.Only Jenna is correct.
B.Neither is correct.
C.Both are correct.
D.Only Allen is correct.
15.One job of the kidneys is to
A.regulate the pH of the blood.
B.destroy old red blood cells.
C.increase the salt and water balance in the blood.
D.produce urea from amino groups and ammonia.
1.Which of the following was one result of the Green Revolution?
A.The protection of species diversity
B.An increase in the yield of crops for less-developed countries
C.The conservation of topsoil
D.An increased reliance on polyculture agriculture
2.Among human populations, the primary use of fresh water is for
A.agriculture and industry.
B.drinking and cooking.
3.During exponential growth, the rate of growth
A.starts quickly and then levels off.
B.starts slowly and then accelerates.
C.declines consistently over time.
D.remains steady over time.
4.Which one of the following interspecies relationships has a negative effect on both species?
5.A complex of interconnected food chains in an ecosystem is called a/an
6.A source from which organisms generally take elements is called a/an
7.Which one of the following conditions is an example of resource partitioning?
A.Two species of birds that eat fruit from the same tree
B.Two species of squirrels—one that eats acorns from the branches and one that eats acorns that have fallen to the ground
C.Two species of mice—one that eats seeds and the other that eats insects
D.A species of butterfly and a species of bee that pollinate the same flower
8.If the birthrate is 10 per 1,000 and the death rate is 10 per 1,000, then the growth rate is
9.The nitrogen utilized by most plants is derived from
C.decayed organic matter.
10.The process of chemical cycling is known as a biogeochemical cycle because it
A.involves both living and nonliving components.
B.absorbs the chemical involved from the sediment.
C.takes place over a long period of time.
D.withdraws the chemical from the atmosphere as a gas.
11.Which one of the following pollutants is responsible for the increase in skin cancer?
B.Chlorine monoxide from automobiles
12.Which of the following is a renewable resource?
13.Modern fishing practices threaten biodiversity mainly through the
A.accidental capture of unwanted species.
B.physical destruction of marine habitats.
C.removal of community food supplies.
D.chemical poisoning of the water.
14.The most common cause of desertification is
D.the construction of dams.
15.Study the following food chain: grass → snakes → rabbits → hawks. From this chain, you can
correctly assume that each population
A.is a carnivore.
B.supports the next trophic level.
C.is always larger than the one before it.
D.is a species of herbivore.