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 4 of 8

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Q31.
In a DNA double helix the bases are held together by hydrogen bonds. These hydrogen bonds are _________

a.

Covalent bonds

b.

Non-covalent bonds

c.

Ionic bonds

d.

Van der Waals forces

Discuss
Answer: (b).Non-covalent bonds
Q32.
It is easy to break the bond between A and T than in between G and C.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q33.
With respect to the importance of hydrogen bonding and DNA double helix stability, which of the following statements is false?

a.

Favorable tautomeric form of nucleotide bases

b.

Contributes to the thermodynamic stability

c.

Decreases the entropy

d.

Specificity of base pairing

Discuss
Answer: (c).Decreases the entropy
Q34.
In the late 1970s non double helical form of DNA was also suggested but was discarded on the basis of certain factors. Which of the following is not a factor responsible?

a.

X-ray crystallography

b.

Nuclein

c.

Topoisomerase

d.

Nucleosome core particle

Discuss
Answer: (b).Nuclein
Q35.
Levene investigated and found that the nucleic acid is composed of poly-nucleotides and each nucleotide is composed of one base, a sugar molecule and a phosphate. This was performed on the genome of________________

a.

Bacteria

b.

Fungi

c.

WBCs

d.

Yeast

Discuss
Answer: (d).Yeast
Q36.
Who were the first to suggest that one strand of DNA might act as a template for the synthesis of its complementary strand?

a.

Meselson and Stahl

b.

Watson and crick

c.

Walter Flemming

d.

Rosalind Franklin and Maurice Wilkins

Discuss
Answer: (b).Watson and crick
Q37.
Semiconservative nature of replication of eukaryotic chromosome was first demonstrated by _______

a.

Walter Flemming on root tip cells of Vicia faba

b.

J. Herbert Taylor, Philip Wood and Walter Hughes on root tip cells of Vicia faba

c.

Walter Flemming on root tip cells of Phaseolus vulgaris

d.

J. Herbert Taylor, Philip Wood and Walter Hughes on root tip cells of Phaseolus vulgaris

Discuss
Answer: (b).J. Herbert Taylor, Philip Wood and Walter Hughes on root tip cells of Vicia faba
Q38.
Watson and Crick’s suggestion of the complementary strand synthesis taking one of the parent strand as template was proposed in _________

a.

1869

b.

1909

c.

1953

d.

1952

Discuss
Answer: (c).1953
Q39.
Which of the following statements is true with respect to the DNA double helix?

a.

Composed of two or more polynucleotide chains

b.

The base pairs have opposite polarity

c.

Covalent bond exists in base pairing

d.

T is transcribed as U

Discuss
Answer: (b).The base pairs have opposite polarity
Q40.
Who, in which year showed firm enzymological proof that DNA alone functions as the template for the synthesis of new DNA strands?

a.

Watson and Crick in 1953

b.

Avery, MacCarty and Macleod in 1944

c.

Meselson and Stahl in 1958

d.

Hershey and Chase in 1952

Discuss
Answer: (c).Meselson and Stahl in 1958
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