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NDA 2021 GAT · General Knowledge · Mole Concept and States of Matter · medium

Nucleic acids: 1. DNA contains the nitrogenous base thymine. 2. RNA contains the nitrogenous base uracil in place of thymine.

Single correct option

Consider the following statements about nucleic acids:
1. DNA contains the nitrogenous base thymine.
2. RNA contains the nitrogenous base uracil in place of thymine.
Which of the statements given above is/are correct?
  1. A. 1 only
  2. B. 2 only
  3. C. Both 1 and 2
  4. D. Neither 1 nor 2
Show answer and solution

Answer: (C) Both 1 and 2

DNA contains the bases adenine, guanine, cytosine and thymine, whereas RNA has uracil instead of thymine. Both statements are therefore correct. This difference, along with the sugar (deoxyribose in DNA, ribose in RNA), is a standard distinction between the two.
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Original question written in the NDA 2021 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake