Question

In eukaryotic cell, the type of ribosome is

• A. Only 70S
• B. Only 80S
• C. Both [a] and [b]
• D. Only SOS

Answer 1

Answer: (C)

Ribosomes are the smallest granules, found in the cytoplasm, contain ribosomal RNA (rRNA) and many ribosomal proteins. On the basis of sedimentation coefficient they are of ret types-
(i) $70S$ ribosomes-They are smaller in size and their sedimentation coefficient is (found in bacteria and chloroplast).
(ii) $80S$ ribosomes-Their sedimentation coefficient is $80S$ and are found in higher plants and animals or eukaryotic cells In $80S$ ribosome, the larger subunit is $60S$ and smaller one $40S$.