NEET 1989 · Class 11

Cell: The Unit of Life

Polyribosomes are aggregates of

  1. (A)ribosomes and rRNA
  2. (B)only rRNA
  3. (C)peroxisomes
  4. (D)several ribosomes held together by string of mRNA

The NCERT line that answers it

Verbatim line

Several ribosomes may attach to a single mRNA and form a chain called **polyribosomes** or **polysome**.

Chapter
Cell: The Unit of Life
Section
8.4.2 Ribosomes and Inclusion Bodies
Page
6
Words matched
16 of 16

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

75, emb=1.0, combined=0.9). Verified: high — The span explicitly states that polyribosomes are formed when 'several ribosomes may attach to a single mRNA and form a chain', which directly matches option D's description of 'several ribosomes held together by string of mRNA'.

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Question text is reproduced from the published NEET 1989 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.