Question

Photosynthetic organisms which lack chlorophyll-a are _________

• A. vascular plants
• B. algae
• C. photosynthetic bacteria
• D. bryophytes

Hint:

Anoxygenic photosynthesis occurs without chlorophyll-a.

Answer 1

The Correct Option is C

Step 1: Understanding chlorophyll types.
Chlorophyll-a is the main pigment involved in oxygenic photosynthesis in plants and algae.

Step 2: Examining photosynthetic bacteria.
Photosynthetic bacteria such as purple and green bacteria perform anoxygenic photosynthesis using bacteriochlorophyll instead of chlorophyll-a.

Step 3: Option analysis.
(A) Vascular plants possess chlorophyll-a.
(B) Algae contain chlorophyll-a.
(C) Photosynthetic bacteria lack chlorophyll-a.
(D) Bryophytes contain chlorophyll-a.

Step 4: Conclusion.
The correct answer is (C) photosynthetic bacteria.