Mitochondria and chloroplast are :(a) semi-autonomous organelles.(b) formed by division of pre - existing organelles and they contain DNA but lack protein synthesizing machinery.Which one of the following options is correct ?

1. Both (a) and (b) are correct.

2. (b) is true but (a) is false.

3. (a) is true but (b) is false.

4. Both (a) and (b) are false.

Doubtly Asked 30 Oct 2026 NEET UG 2016 Phase 1 Practice test neet Save WhatsApp Report

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Best answer

Answer: 3. (a) is true but (b) is false.

Key idea: Mitochondria and chloroplasts are semi-autonomous organelles.

(a) True. They have their own DNA and ribosomes, but still depend on nuclear genes for many proteins.
(b) False. They do arise by division of pre-existing organelles and contain DNA, but they do have protein synthesizing machinery (70S ribosomes, tRNA).

So (a) is true and (b) is false: option (3).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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