Photosynthetic Pathways & Light Reactions — NEET Biology
📚 Practice ConceptGive comparison between the following: (a) C₃ and C₄ pathways (b) Cyclic and non-cyclic photophosphorylation (c) Anatomy of leaf in C₃ and C₄ plants
In a maize leaf, cyclic photophosphorylation predominates when NADP+ is low. If simultaneously CO₂ supply is reduced, which of the following occurs?
View solution & NCERT explanation
Correct answer: C — Extra ATP is formed to support the C₄ cycle; the Calvin cycle in the bundle sheath continues partially; photorespiration is avoided
During cyclic photophosphorylation electrons from PSI cycle back to PSI, producing ATP but no NADPH. This extra ATP supports the C₄ pathway. In maize, PEPCO continues to fix CO₂ in mesophyll even when CO₂ supply is reduced and the Calvin cycle in bundle sheath continues partially. The C₄ pathway concentrates CO₂ around RuBisCO, so photorespiration is avoided.
What does NCERT say about Give comparison between following?
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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.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.