Oxygen is not produced during photosynthesis by

1. Green sulphur bacteria

2. *Cycas*

3. *Nostoc*

4. *Chara*

Doubtly Asked 30 Oct 2026 NEET UG 2018 Practice test neet Save WhatsApp Report

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Answer: 1. Green sulphur bacteria

Green sulphur bacteria perform anoxygenic photosynthesis using H\(_2\)S, so they release no oxygen.

Cycas (plant), Nostoc (cyanobacterium) and Chara (green alga) split water and release O\(_2\).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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