Biochemistry MCQs on Nucleic Acids

Biochemistry MCQs on Nucleic Acids

Also Read Biology MCQ

1. Nucleic acids combine with which biomolecule?

(a) Fats

(b) Lipids

(c) Carbohydrates

(d) Proteins

Answer (d) Proteins

2. Nucleotides are linked together to form nucleic acid through

(a) Glycosidic bond

(b) Phosphor-di-ester bond

(c) Both

(d) None

Answer (b) Phosphor-di-ester bond

3. nucleotides have how many components?

(a) 2

(b) 3

(c) 4

(d) 5

Answer (c) 4

4. The compound does not contain the phosphate group, is

(a) Nucleotide

(b) Nucleoside

(c) Both

(d) None

Answer (b) Nucleoside

5. Which of the following is purine nucleotide?

(a) Adenine

(b) Uracil

(c) Thymine

(d) All of the above

Answer (a) Adenine

6. Which of the following is pyrimidine nucleotide?

(a) Uracil

(b) Cytosine

(c) Thymine

(d) All of the above

Answer (d) All of the above

7. RNA doesn’t have

(a) Uracil

(b) adenine

(c) Thymine

(d) guanine

Answer (c) Thymine

8.Where is RNA present?

(a) Mitochondria

(b) Nucleolus

(c) Cytoplasm

(d) Both B and C

Answer (d) Both B and C

9. Phosphate group is attached to which carbon of pentose sugar

(a) C-1

(b) C-2

(c) C-4

(d) C-5

Answer (d) C-5

10. What is the full form of AMP?

(a) Adenine mini-phosphate

(b) Aldehyde mono-phosphate

(c) Alcohol mono-phosphate

(d) None of the above

Answer (d) None of the above

11.Which of the following protein is the component of nucleoprotein?

(a) Proline

(b) Arginine

(c) Histones

(d) All of the above

Answer (c) Histones

12.Number of hydrogen bonds between adenine and thymine?

(a) 1

(b) 2

(c) 3

(d) 4

Answer (b) 2

13.Number of hydrogen bonds between guanine and cytosine?

(a) 1

(b) 2

(c) 3

(d) 4

Answer (c) 3

14.Which ratio is constant for DNA?

(a) A + G / T + C

(b) A + T / G + C

(c) A + C / U + G

(d) A + U / G + C

Answer (a) A + G / T + C

15.The disruption of nucleosomal structure is due to

(a) Acetylation

(b) Carboxylation

(c) Phosphorylation

(d) Methylation

Answer (d) Methylation

 16.Left handed helix contained nucleic acid is

(a) M-RNA

(b) T-RNA

(c) A-DNA

(d) Z-DNA

Answer (d) Z-DNA

17. A phosphodiester bond is present in

(a) Nucleic acids in a nucleotide

(b) Monosaccharides in a polysaccharide

(c) Amino acids in a polypeptide

(d) Fatty acids in a diglyceride

Answer (a) Nucleic acids in a nucleotide

18. Uridine present in RNA is

(a) Nucleotides

(b) Pyrimidine

(c) Purine

(d) Nucleoside

Answer (d) Nucleoside

19. Nucleic acids are a polymer of nucleotide monomeric units. Each nucleotide consists of

(a) base­-sugar-­OH

(b) sugar-­phosphate

(c) base­-sugar-­phosphate

(d) (base­-sugar­-phosphate)x

Answer (c) base­-sugar-­phosphate

20.No.of nucleotide found in  DNA segment if it  contains 100 Adenine and 100 cytosines,

(a) 100

(b) 200

(c) 400

(d) 50

Answer (c) 400

21. Nucleoside contains

(a) base-sugar

(b) base-phosphate

(c) base-sugar-phosphate

(d) sugar-phosphate

Answer (a) base-sugar

22. ATP is a

(a) Nucleoside

(b) Nucleotide

(c) Vitamin

(d) Nucleic acid

Answer (b) Nucleotide

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