Question

The 70S prokaryotic ribosome can be split into:

• A. 30S and 50S subunits
• B. 40S and 30S subunits
• C. 20S and 50S subunits
• D. 30S and 60S subunits

Answer 1

The correct option is A 30S and 50S subunits

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 cell, the ribosomes present outside the cell organelles are of 80S type. They are made up of two subunits 40S and 60S.
The 70S ribosome is made up of 3 molecules of RNA - 16S RNA in 30S subunit and 23S and 5S RNA in 50S subunit.
The 80S ribosome is made up of 4 molecules of RNA - 18S in 40S subunit and 28S, 5.8S and 5S in 60S subunit.

So, the correct answer is '30S and 50S subunits'