NEET 2018 · BiologyProkaryotePrevious Year Question
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
Answer: (C) Polysome. Answer: (C) Polysome Solution: When several ribosomes attach to a single mRNA and translate it simultaneously, the resulting chain is called a polyribosome or polysome.
- A.Plastidome
- B.Polyhedral bodies
- C.Polysome✓
- D.Nucleosome
Correct Answer
(C) Polysome
Solution & Explanation
Answer: (C) Polysome Solution: When several ribosomes attach to a single mRNA and translate it simultaneously, the resulting chain is called a polyribosome or polysome. This allows multiple copies of the same polypeptide to be made at once. Nucleosome relates to DNA-histone packaging, making polysome the correct term. NCERT Reference: Ch 8, p.91, lines 23-26: "Several ribosomes may attach to a single mRNA and form a chain called polyribosomes or polysome. The ribosomes of a polysome translate the mRNA into proteins."
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