GATE 2020 BT – Question 48

Genetics, Cellular and Molecular Biology · Cell Biology: Eukaryotic cell structure, cell cycle and growth control, cell-cell communication, signalling and signal transduction · 2 marks · Multiple choice

Match organelles P mitochondrion, Q chloroplast, R nucleus, S endoplasmic reticulum with features 1 single membrane; 2 double membrane; 3 maternal inheritance; 4 endosymbiotic origin.

P–1, Q–4, R–2, S–3
P–2, Q–3, R–4, S–1
P–3, Q–4, R–2, S–1
P–3, Q–1, R–4, S–2

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Correct answer: (C) P–3, Q–4, R–2, S–1

Explanation

Mitochondria show the intended maternal inheritance association, P–3. Chloroplasts have an endosymbiotic origin, Q–4. The nucleus is bounded by a double-membrane nuclear envelope, R–2, and ER by a single membrane, S–1. This gives C. Some features overlap between organelles, but only this complete one-to-one combination matches all four listed associations.

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