Question

Organelle and prokaryotic ribosomes are generally

• A. 80 S
• B. 100 S
• C. 70 S
• D. 45 S

Answer 1

The correct option is C 70 S

• Ribosomes are known as protein factories because they are the main site of protein synthesis.
  
• It is made up of two subunits-

1. Large subunits- join amino acids to form a polypeptide chain.
   
2. Small subunits- reads RNA.
   

• In prokaryotic cell and the cellular organelles (mitochondria, chloroplast), the ribosome present is a 70S type.
• It is made up of two subunits- a larger subunit 50S and a smaller subunit 30S.
• So, the correct answer is '70 S'.