Q30 / 200 · NEET 2012 (Screening) · Botany

What is true about ribosomes?

  • A
    The prokaryotic ribosomes are $80 \mathrm{~S}$, where $S$ stands for sedimentation coefficient
  • Correct answer
    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

Solution

Ribosomes are large, non-membranous, RNA-protein complexes which are necessary for protein synthesis. In prokaryotes, $70 \mathrm{~S}$ type of ribosomes are found while $80 \mathrm{~S}$ type of ribosomes are found in eukaryotes.

Hence, the correct answer is option: 'B'.

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