Question

Respiratory enzymes in a bacterium are found associated with:

• A. DNA
• B. Plasma membrane
• C. Mitochondria
• D. Cell wall

Answer 1

The correct option is B

Plasma membrane

The correct option is B.

Explanation of the correct option:

1. Bacteria are prokaryotes.
2. Respiratory enzymes are located at the cell membrane or plasma membrane of prokaryotes.
3. Mesosomes are the finger-like infoldings of the cell membrane in bacterial cells. They increase the amount of surface area available. It contains the respiratory enzymes essential for respiration.

Explanation of the incorrect options:

Option A:

DNA is responsible for the transfer of characters from parents to offspring.

Option C:

Mitochondria are present only in eukaryotes. It is the powerhouse of the cell.

Option D:

The cell wall of bacteria is made up of modified polysaccharides called peptidoglycans.

Final answer: Respiratory enzymes in a bacterium are found associated with the plasma membrane.