13. Adenine bonds with ___________in DNA but with _____________in RNA. a. uracil

Question

13. Adenine bonds with ___________in DNA but with _____________in RNA.

a. uracil, thymine

b. thymine, uracil

c.cytosine, uracil

d. thymine, guanine

14. Guanine bonds with ___________________________.

a. cytosine

b. adenine

c. thymine

d. uracil

15. The bond between the complementary bases is a _____________ bond.

16.DNA and RNA differ in that DNA _________

a. contains a six-carbon sugar and RNA contains a five-carbon sugar.

b. DNA is a double helix and RNA is single stranded.

c. DNA contains thymine, whereas RNA contains uracil.

d. DNA is composed of nucleotides and RNA is composed of amino acids.

e. b and c are correct

Explanation / Answer

13) Option b is the correct answer.

Adenine bonds with Thymine in DNA but with Uracil in RNA. In DNA, adenine binds to thymine via two hydrogen bonds to assist in stabilizing the nucleic acid structures. Uracil found in RNA, it base-pairs with adenine and replaces thymine during DNA transcription.

14) Option a is the correct answer.

Guanine bonds with Cytosine. Guanine, along with adenine and cytosine, is present in both DNA and RNA, whereas thymine is usually seen only in DNA, and uracil only in RNA. In DNA, guanine is paired with cytosine via three hydrogen bonds.

15) Options e is correct, i.e., both b and c options are correct answer.

DNA is a double helicle structure composed of repeating units of deoxyribonucleotides with A (Adenine) and G (Guanine) as purine bases and C (Cytosine) and T (Thymine) as pyrimidine bases. RNA is a single stranded structure composed of reapeating units of ribonucleotides with A (Adenine) and G (Guanine) as purine bases and C (Cytosine) and U (Uracil) as pyrimidine bases

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