NEET 2026 (Phase 1) · BiologyRibosomesPrevious Year Question

Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are ______.

Answer: (A) Ribosomes. Answer: (A) Ribosomes Solution: Ribosomes are non-membrane-bound organelles composed of rRNA and protein, and they occur in BOTH prokaryotic cells (70S) and eukaryotic cells (80S, plus 70S in mitochondria and chloroplasts).

A.Ribosomes✓
B.Lysosomes
C.Centrosomes
D.Mitochondria

Correct Answer

(A) Ribosomes

Solution & Explanation

Answer: (A) Ribosomes Solution: Ribosomes are non-membrane-bound organelles composed of rRNA and protein, and they occur in BOTH prokaryotic cells (70S) and eukaryotic cells (80S, plus 70S in mitochondria and chloroplasts). Lysosomes, centrosomes and mitochondria are characteristic of eukaryotic cells (and lysosomes/mitochondria are membrane-bound), so they do not fit the 'non-membrane bound, present in both' criterion. NCERT Reference: Ch 8, p.98, lines 31–34: "They are composed of ribonucleic acid (RNA) and proteins and are not surrounded by any membrane. The eukaryotic ribosomes are 80S while the prokaryotic ribosomes are 70S."

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