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STD 11 - 2. Biology classification — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 2. Biology classification4 Marks
MCQ
Which one of the following organisms do not evolve oxygen during photosynthesis?
  • A
    Blue-green algae
  • B
    Red algae
  • ✓
    Photosynthetic bacteria
  • D
    $C_{4}$ plants
✓

Answer

Correct option: C.
Photosynthetic bacteria
c
The photosynthetic bacteria like purple non-sulphur bacteria photosynthesise using bacteriochlorophyll$a$ and $b$ in anoxic environments, such as stagnant water. The reducing agent involved is hydrogen rather than oxygen hence, oxygen is not produced.

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