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JEE Main · 2024 · 30 Jan 2024 · Shift 2 · Biomolecules

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The total number of correct statements, regarding the nucleic acids is ____.
A. RNA is regarded as the reserve of genetic information.
B. DNA molecule self-duplicates during cell division
C. DNA synthesizes proteins in the cell.
D. The message for the synthesis of particular proteins is present in DNA
E. Identical DNA strands are transferred to daughter cells.

Answer: 3

Solution

DNA, not RNA, is the primary repository of hereditary information in most organisms, so statement A is false. During the S phase of the cell cycle, DNA replicates semiconservatively to produce two identical copies for the daughter cells, so statement B is true. DNA is not itself translated into protein — it is transcribed into mRNA, which ribosomes then translate — so statement C is false. The base sequence of DNA (the genetic code) specifies the amino-acid sequence of every protein a cell makes, so statement D is true. During mitosis, identical DNA copies segregate to each daughter cell, so statement E is true. Statements B, D and E are correct, giving three correct statements.

JEE Main · 2024 · 30 Jan 2024 · Shift 2 · Integer answer

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