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What is true about ribosomes?

1. The prokaryotic ribosomes are 80S, where 'S' stands for sedimentation coefficient
2. These are composed of ribonucleic acid and proteins
3. These are found only in eukaryotic cells
4. These are self-splicing introns of some RNAs

Correct answer: These are composed of ribonucleic acid and proteins

Solution

Ribosomes are ribonucleoprotein particles, meaning they contain both rRNA and proteins. The other choices are incorrect because prokaryotic ribosomes are 70S, ribosomes occur in both prokaryotes and eukaryotes, and self-splicing introns are not ribosomes.

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