Question

Pigment containing membranous extensions in some cyanobacteria are

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

Answer 1

The Correct Option is A

In some cyanobacteria, pigment-containing membranous structures are referred to as chromatophores. Let us understand why this is the correct answer and evaluate the other options:

1. Chromatophores: These are specialized membranous structures containing pigments that are involved in photosynthesis. In cyanobacteria, chromatophores help capture light energy to convert it into chemical energy. They contain chlorophyll and other pigments, making them crucial for the photosynthetic process.
2. Heterocysts: These are specialized cells found in some filamentous cyanobacteria responsible for nitrogen fixation. They are not primarily involved in housing pigments but play a key role in converting atmospheric nitrogen into ammonia, which can be used by the cyanobacteria.
3. Basal bodies: These are structural components located at the base of a flagellum or cilium, anchoring them and facilitating their movement. They are unrelated to pigment storage or photosynthesis.
4. Pneumatophores: These are specialized aerial roots found in certain mangrove species to facilitate gas exchange. They are not present in cyanobacteria and do not function in pigment storage or photosynthesis.

Therefore, the correct answer is Chromatophores, as they are the pigment-containing membranous extensions in some cyanobacteria that facilitate the absorption of light for photosynthesis.