STD 11 - 8. Cell the unit of life — BIOLOGY STD 11 Science — Question
Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 8. Cell the unit of life1 Mark
MCQ
Pigment containing membranous extensions in some cyanobacteria are
A
pneumatophores
✓
chromatophores
C
heterocysts
D
basal bodies.
✓
Answer
Correct option: B.
chromatophores
b (b) : Chromatophore is a pigmented lamellar or vesicular structure that can be isolated from disrupted photosynthetic bacteria or cyanobacteria. Their plasma membrane may be projected in folds into the cytoplasm forming lamellae that have, therefore, double unitmembrane structure. The pigments and most of the enzymes required for the lightinduced electron transport and phosphorylation processes of photosynthesis, are located in the plasma membrane and lamellae.
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