Which of the following statements is not true about RNA?
Biomolecules · Class 12 · JEE Main Previous Year Question
Which of the following statements is not true about RNA?
- a✓
It has always double stranded -helix structure.
- b
It usually does not replicate.
- c
It is present in the nucleus of the cell.
- d
It controls the synthesis of protein.
It has always double stranded -helix structure.
Step 1: Structural Traits — RNA is typically a single-stranded molecule, unlike the double-stranded -helix seen in DNA.
Step 2: Secondary Structures — While RNA can form local double-stranded regions (hairpins), it is not "always" a double-stranded -helix.
Step 3: Conclusion — Therefore, statement (a) is the only one that is not true. Correct option is (a).
Key Point: RNA also differs by having ribose sugar and Uracil instead of deoxyribose and Thymine.
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