Question

........................ amino acids are found in highest quantity in ribosomes.

• A. Glycine and tryptophan
• B. Lysine and arginine
• C. Histidine and threonine
• D. Lysine only

Answer 1

Answer: (B)

Lysine and arginine

Ribosomes are minute cell organelles which are found in both prokaryotic and eukaryotic cells. These organelles are primarily involved in protein synthesis. They are made up of rRNA and proteins. Hence, they are also called ribonucleoprotein particles. The proteins of ribosomes are rich in basic amino acids like lysine and arginine. This is because basic amino acids are positively charged and can bind negatively charged nucleic acid molecule. This electrostatic interaction is useful for the role of ribosomes in protein synthesis.

So, the correct answer is 'Lysine and arginine'