Question

Branched chain of lipids occur in the cell membranes of______

• A. Mycoplasma
• B. Streptomyces
• C. Actinomycetes
• D. Archaebacteria

Answer 1

The correct option is D

Archaebacteria

The correct option is D.

Explanation for the correct option:

1. The primitive bacteria are known as archaebacteria.
2. This organism's cell membrane contains glycolipids, glycoproteins, and amino acids that are joined by an ether bond.
3. The organism is protected by this network of branching lipids, which helps it to survive in harsh environments.

Explanation for incorrect options:

Option A:

1. Mycoplasma is a genus of bacteria that lacks a cell wall enclosing their cell membranes.
2. Murein (peptidoglycan) is not present.
3. Antibiotics that target cell wall production are naturally resistant to them because of this trait (like the beta-lactam antibiotics).

Option B:

1. Streptomyces is a Gram-positive bacteria genus that develops in a variety of settings and has a filamentous fungus-like form.
2. Streptomyces forms a layer of hyphae that can differentiate into a chain of spores during morphological differentiation.

Option C:

1. Actinomycetes are a class of unicellular filamentous bacteria that release spores and develop a branching network of filaments.
2. They've long been suspected of causing unpleasant earthy-musty taste and odor in water.

Final Answer: Branched chain of lipids occurs in the cell membranes of archaebacteria.