Question

What is true about ribosomes?

• A. The prokaryotic ribosomes are 80 S, 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

Answer 1

Answer: (B)

Ribosome is a small spherical body within a living cell that is the site of protein synthesis. Ribosomes consist of two subunits, one large and one small, each of which comprises a type of RNA (called ribosomal RNA) and protein. They are found in both eukaryotic and prokaryotic cells. In prokaryotes 70 S ribosomes and in eukaryotes 80 S ribosomes are found where 'S' denotes Svedberg Unit.