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Kingdom Monera

Mediumbiology

Which characteristic is typical of cyanobacteria but absent in most true bacteria?

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About This Question

Subject
biology
Chapter
diversity in living world
Topic
kingdom monera
Difficulty
Medium
Year
2025
Tags
CyanobacteriaMonera

Solution

Correct Answer:

Photosynthetic pigments with oxygenic photosynthesis

  1. Prokaryotes: Both True Bacteria (Eubacteria) and Cyanobacteria (Blue-green algae) belong to Kingdom Monera and share prokaryotic traits (no nucleus, 70S ribosomes, peptidoglycan walls).
  2. Photosynthesis types:
    • Most True Bacteria: If they photosynthesize, they are usually anoxygenic (do not produce oxygen, purple sulfur bacteria).
    • Cyanobacteria: They have Chlorophyll (similar to green plants) and perform oxygenic photosynthesis (splitting water to release ).
  3. Unique Pigments: They also contain phycobiliproteins (phycoerythrin and phycocyanin).

This medium difficulty biology question is from the chapter diversity in living world, covering the topic of kingdom monera. It appeared in the 2025 exam.

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