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
