Question

Pigment-containing membranous extensions in some cyanobacteria are:

• A. Basal bodies
• B. Chromatophores
• C. Heterocysts
• D. Pneumatophores

Answer 1

The correct option is B

Chromatophores

The correct option is B.

Explanation of the correct option:

1. Chromatophores are compartments in the cytoplasm of cyanobacteria.
2. They are internal membranous systems containing pigments which are essential for photosynthesis.
3. The pigments stored are chlorophyll a, carotenes, and xanthophylls.

Explanation of the incorrect options:

Option A:

1. Basal bodies are microtubule-based organelles.
2. They are derived from centrioles.
3. They act as anchoring sites for proteins.

Option C:

Heterocysts are sites for nitrogen fixation in aerobic conditions.

Option D:

1. Pneumatophores are a modification of roots.
2. They help in the exchange of gases.

Final answer: Pigment-containing membranous extensions in some cyanobacteria are chromatophores.