DNA,RNA and Protein MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on DNA,RNA and Protein, a fundamental topic in the field of Molecular Biology. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our DNA,RNA and Protein MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of DNA,RNA and Protein mcq questions that explore various aspects of DNA,RNA and Protein problems. Each MCQ is crafted to challenge your understanding of DNA,RNA and Protein principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Molecular Biology tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our DNA,RNA and Protein MCQs are your pathway to success in mastering this essential Molecular Biology topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of DNA,RNA and Protein. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

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DNA,RNA and Protein MCQs | Page 3 of 8

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Q21.
In one strand of a double stranded DNA the rate of occurrence of A is 3 times C in consecutive 10 bases. So how many G will be there in 100 base pairs of a DNA duplex?[Consider G=T in one strand].

a.

30

b.

20

c.

40

d.

60

Discuss
Answer: (c).40
Q22.
In a diploid organism with 30,000 bases haploid genome contains 23% A residues. What is the number of G residues in the genome of this organism?

a.

16000

b.

16200

c.

16500

d.

14200

Discuss
Answer: (b).16200
Q23.
Which of the following is not a characteristic of nucleotide bases?

a.

Planar

b.

Heterocyclic

c.

Aliphatic

d.

Ubiquitous

Discuss
Answer: (c).Aliphatic
Q24.
Which of the following factors do not provide to the separation of DNA fragments during electrophoresis?

a.

Chargaff’s rule

b.

Matrix density

c.

Ethidium bromide

d.

Size

Discuss
Answer: (c).Ethidium bromide
Q25.
Which one of the following is not a function of a nucleotide?

a.

Nucleic acid monomer

b.

Ribozyme

c.

Energy carrier molecules

d.

Receptors

Discuss
Answer: (d).Receptors
Q26.
The first X-ray diffraction patterns of DNA were taken in 1938 by ___________

a.

William Asbury

b.

Rosalind Franklin

c.

Francis H. Crick

d.

Linus Pauling

Discuss
Answer: (a).William Asbury
Q27.
In early 1950s high quality X-ray diffraction photographs of DNA suggesting the DNA being double helix and composed of two nucleotide strands. Who took those photographs?

a.

Rosalind Franklin

b.

William Asbury

c.

Francis H. Crick and James D. Watson

d.

Rosalind Franklin and Maurice Wilkins

Discuss
Answer: (d).Rosalind Franklin and Maurice Wilkins
Q28.
In 1952, an unambiguous established work in the laboratory of Alexander Todd led to the discovery of _____________

a.

Chemical nature of DNA

b.

X-ray diffraction structure of DNA

c.

3’-5’ phosphodiester linkage regularly links the nucleotides of DNA

d.

Nucleic acid strands are held together by hydrogen bonds

Discuss
Answer: (c).3’-5’ phosphodiester linkage regularly links the nucleotides of DNA
Q29.
What should be the complementary strand of 3’….ATGGCTTGA….5’?

a.

3’….TACCGAACT….5’

b.

5’….TACCGAACT….3’

c.

3’….TAGGCAAGT….5’

d.

5’….TAGGCAAGT….3’

Discuss
Answer: (b).5’….TACCGAACT….3’
Q30.
The hydrogen bonds formed during A and T bonding occurs between C₆NH₂ of A and __________

a.

C4O of T

b.

PO3⁻

c.

C6O of A

d.

C1O of T

Discuss
Answer: (a).C4O of T
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