Oxygen Source in Photosynthesis — NEET Biology
📚 Practice Concept📖 NCERT Source
The O₂ released is from water; this was proved using radio isotope techniques. Note that this is not a single
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QuestionPractice Question
Assertion (A): Van Niel proposed that O₂ is released from water in photosynthesis. Reason (R): H₂O splits during the light reaction to release O₂.
📖 Solution & NCERT Explanation
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Correct answer: A — Both A and R are true and R is the correct explanation of A
Van Niel's hypothesis is supported by later experimental proof involving splitting of water.
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What does NCERT say about O released from water?
The O₂ released is from water; this was proved using radio isotope techniques. Note that this is not a single
Has this concept appeared in NEET?
Practice this NCERT concept with questions on MedicNEET.
Which chapter is this from?
Photosynthesis in Higher Plants, Class 11 NCERT Biology.
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
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