What is true about ribosomes?

(A)The prokaryotic ribosomes are 80S, where "S" stands for sedimentation coefficient.
(B)These are composed of ribonucleic acid and proteins.
(C)These are found only in eukaryotic cells.
(D)These are self-splicing introns of some RNAs.

The NCERT line that answers it

Verbatim line

They are composed of ribonucleic acid (RNA) and proteins and are not surrounded by any membrane.

Chapter: Cell: The Unit of Life
Section: 8.5.6 Ribosomes
Page: 13
Words matched: 16 of 16

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

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'They are composed of ribonucleic acid (RNA) and proteins', which directly matches and proves option B, distinguishing it from the incorrect options.

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Question text is reproduced from the published NEET 2012 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.