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CHEMISTRY . Please help . i got a 25% . this is a retake .A

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CHEMISTRY . Please help . i got a 25% . this is a retake .

A __________ is the combination of base, a deoxyribose molecule, and a phosphate group.

A. chromosome

B. genome

C. DNA strand

D. nucleotide Reset Selection

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Question 2 of 20
5.0 Points
The molecular structure of deoxyribonucleic acid dictates:

A. the manner in which chromosomes are organized.

B. the way DNA encodes genetic information.

C. how molecules carry genetic information.

D. how chemical reactions burn food. Reset Selection

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Question 3 of 20
5.0 Points
In a DNA model, the alternating __________ and phosphate groups are represented on the two twisted ribbons.

A. thymine

B. guanine

C. sugar

D. cytosine Reset Selection

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Question 4 of 20
5.0 Points
Before a cell __________, the double helix partially and rapidly unwinds.

A. dies

B. divides

C. replicates

D. bonds Reset Selection

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Question 5 of 20
5.0 Points
The overall shape or conformation of the protein molecule is termed its __________ structure.

A. tertiary

B. primary

C. secondary

D. substrate Reset Selection

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Question 6 of 20
5.0 Points
All enzymes are:

A. sugars.

B. proteins.

C. phosphates.

D. glycogens. Reset Selection

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Question 7 of 20
5.0 Points
Bacteria contain rings of __________ called plasmids.

A. molecules

B. hydrocarbon

C. DNA

D. cells Reset Selection

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Question 8 of 20
5.0 Points
DNA __________ utilize(s) unique fragments of DNA to identify a specific individual.

A. sourcing

B. fingerprinting

C. analysis

D. probes Reset Selection

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Question 9 of 20
5.0 Points
__________ in cells, but not within cell nuclei, are vital to energy production.

A. Fatty acids

B. Hydrocarbons

C. Mitochondria

D. Proteins Reset Selection

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Question 10 of 20
5.0 Points
Before __________ there was no hepatitis B vaccine.

A. transgenic modifications

B. recombinant DNA

C. electrophoresis

D. DNA probes Reset Selection

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Question 11 of 20
5.0 Points
The biochemists who set out to decipher the genetic code concentrated on translating base language into __________ language.

A. codon

B. substrate

C. amino acid

D. DNA coded Reset Selection

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Question 12 of 20
5.0 Points
Chromosomes consist of __________ compact structures of intertwined molecules of DNA in a human cell nucleus.

A. 39

B. 46

C. 48

D. 52 Reset Selection

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Question 13 of 20
5.0 Points
What is the totality of human hereditary information in molecular form called?

A. Chromosome

B. Human genome

C. DNA

D. RNA Reset Selection

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Question 14 of 20
5.0 Points
What is a nucleotide?

A. The combination of nitrogenous base, sugar, and phosphate group

B. Phosphate units

C. Deoxyribose

D. The combination of deoxyribose and a phosphate group Reset Selection

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Question 15 of 20
5.0 Points
Francis Crick established that genetic code was written in groupings of three DNA bases known as:

A. codons.

B. amino acid residues.

C. complementary bases

D. clonings. Reset Selection

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Question 16 of 20
5.0 Points
Organic polymers of amino acids linked together by peptide bonds are called:

A. proteins.

B. codons.

C. genetic codes.

D. DNA bases. Reset Selection

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Question 17 of 20
5.0 Points
Electrophoresis and __________ have made genetic fingerprinting a highly accurate and viable method for fighting crime.

A. x-ray diffraction

B. nuclear transfer

C. polymerase chain reaction

D. amniocentesis Reset Selection

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Question 18 of 20
5.0 Points
The molecule with its reaction catalyzed by an enzyme is the:

A. catalyst.

B. active site.

C. substrate.

D. coenzyme. Reset Selection

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Question 19 of 20
5.0 Points
Interferons are:

A. proteins that are produced by cells under viral attack.

B. genetically engineered proteins.

C. viruses that attack.

D. proteins that produce carbohydrates when they encounter a virus. Reset Selection

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Question 20 of 20
5.0 Points
Diabetes is more effectively treated today through the creation of insulin by:

A. sickle-cell anemia.

B. recombinant DNA.

C. polymerase chain reaction.

D. electrophoresis.
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Hello Cora,

Thanks for your positive rating. Hope you did well on this quiz. Good luck in all your studies!


Customer: replied 4 years ago.

thank you!