Question

In bacteria formation of peptide bond during translation is effected by

• A.
  Nucleosome
• B.
  Lysosomes
• C.
  Peroxisomes
• D.
  Ribozyme

Answer 1

The correct option is D

Ribozyme
Introduction to peptide bond
A peptide bond helps to join two amino acids by removing a molecule of water. It is formed between the -COOH group of the amino acid attached to the 3’ end of the tRNA present on the P site of the ribosome and the -NH2 group of the amino acid attached to the tRNA on the A site of the ribosome.

Peroxisomes
Peroxisomes are the organelles present in the cells that help in oxidation of compounds such as fatty acids or amino acids and produce hydrogen peroxide in the process. These are membrane-bound organelles and are absent in bacteria.

Lysosomes
Lysosomes are the membrane-bound organelles present in eukaryotic cells that digest substances inside the cell with the help of hydrolytic enzymes stored in them.

Ribozyme
The formation of peptide bonds in bacteria is carried out by 23S rRNA which is a ribozyme having the peptidyl transferase activity.

Nucleosome
Nucleosomes are eukaryotic chromosome packaging units made up of a core of 8 histone molecules with DNA wrapped around them. Nucleosomes are absent in bacteria.