Question
Oxygen is not produced during photosynthesis by:
Green sulphur bacteria
Nostoc
Cycas
Chara
Cornelius van Niel demonstrated that in purple and green sulphur bacteria, the hydrogen donor is H2S instead of H2O. Consequently, the oxidation product is sulphur or sulphate depending on the organism, and O2 is not evolved. In contrast, Nostoc (cyanobacteria), Cycas (gymnosperm), and Chara (green alga) perform oxygenic photosynthesis where water is the hydrogen donor and O2 is released.
This question aligns with the NEET BIOLOGY syllabus, specifically targeting concepts from Photosynthesis in Higher Plants . Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.
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