Question 1

Which of the following elements are found in nucleic acids?

Accepted Answer

C, H, O, N, P

Answer

C, H, O, N, P, S

Answer

C, H, O

Answer

C, H, O, N

Question 2

Which of the following is a monomer of a nucleic acid?

Accepted Answer

nucleotide

Answer

nitrogenous base

Answer

monosaccharide

Answer

amino acid

Question 3

Which of the following is NOT on of the three groups comprising a nucleotide?

Accepted Answer

R group

Answer

phosphate

Answer

nitrogenous base

Answer

pentose sugar

Question 4

Which of the following describes the difference between a purine and a pyrimidine?

Accepted Answer

Pyrimidines are single ring structures while purines are double ring structures.

Answer

Purines are composed of single bonds while pyrimidines are composed of double bonds.

Answer

Purines are single ring structures while pyrimidines are double ring structures.

Answer

Pyrimidines are composed of single bonds while purines are composed of double bonds.

Question 5

Which of the following are purines?

Accepted Answer

adenine and guanine

Answer

adenine and cytosine

Answer

guanine and thymine

Answer

guanine and cytosine

Question 6

Which of the following are pyrimidines?

Accepted Answer

cytosine, thymine, uracil

Answer

guanine and uracil

Answer

cytosine and thymine

Answer

adenine and guanine

Question 7

Which of the following describes the base pairing and bonding involved with nitrogenous bases?

Accepted Answer

Adenine bonds with thymine with 2 hydrogen bonds.

Answer

Adenine bonds with uracil with 3 hydrogen bonds.

Answer

Adenine bonds with guanine with 3 hydrogen bonds.

Answer

Adenine bonds with cytosine with 2 hydrogen bonds.

Question 8

Which of the following describes a DNA strand that would be most stable at high temperatures?

Accepted Answer

25% A/T and 75% C/G

Answer

100% A/T and 0% C/G

Answer

50% A/T and 50% C/G

Answer

75% A/T and 25% C/G

Question 9

A researcher investigating a RNA strand discovers it contains 36% uracil, which of the following identifies the amount of cytosine?

Accepted Answer

Cannot be determined.

Answer

64%

Answer

18%

Answer

36%

Question 10

Which of the following describes the directionality of nucleic acids?

Accepted Answer

5' end has a phosphate and 3' has a hydroxyl group.

Answer

5' end has an amino group and 3' has a carboxyl group.

Answer

5' end has a hydroxyl group and 3' has a phosphate.

Answer

5' end has a carboxyl group and 3' has an amino group.

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