Question

Ribosomes of chloroplasts, mitochondria and bacteria are of types

• A. 50 S
• B. 80 S
• C. 70 S
• D. 30 S

Answer 1

The correct option is C 70 S

Ribosomes are naked ribonucleoprotein particles found in both prokaryotic and eukaryotic cells. The ribosomes of prokaryotic cells are of 70S type, made up of two subunits- 30S and 50S. In an eukaryotic cells, ribosomes are present inside organelles like mitochondria and chloroplasts. These ribosomes resemble the ribosomes of a prokaryotic cell in sedimentation coefficient. So, the correct answer is '70 S'.