NEET · Class 11 Biology
Photosynthesis in Higher Plants MCQs for NEET
Most students lose marks here by mixing up the two photosystems and the C3 and C4 pathways. Answer these questions, read the reasons, and let the app schedule a repeat test before you forget them.
Take the free 10-question testFree PDF revision sheet — Photosynthesis in Higher Plants
One printable page-set with the NCERT recap, exam tips and all 4 questions with answers and reasons. Free to share and print.
Practice questions on Photosynthesis in Higher Plants
Q1. The splitting of water during photosynthesis is associated with:
Q2. The primary CO2 acceptor in C4 plants is:
Q3. How many ATP and NADPH molecules are required to fix one CO2 in the Calvin cycle?
Q4. Photorespiration in C3 plants is wasteful because:
Quick NCERT recap
- Light reaction happens in the thylakoid membrane; the Calvin cycle happens in the stroma.
- PS I absorbs light at 700 nm (P700), PS II at 680 nm (P680); water splitting is linked to PS II.
- Non-cyclic photophosphorylation gives ATP, NADPH and O2; cyclic gives only ATP.
- C3 plants fix CO2 with RuBisCO into 3-PGA; C4 plants fix it first as oxaloacetic acid in mesophyll cells.
- Photorespiration happens in C3 plants when RuBisCO binds O2; there is no ATP or NADPH gain.
Exam tips for this chapter
- Learn the Kranz anatomy of C4 plants — bundle sheath cells with thick walls and no intercellular spaces.
- Remember: 3 ATP and 2 NADPH are used per CO2 fixed in the Calvin cycle.
- Know the exact site of each step; NEET often asks 'where does this happen'.
Common questions
Is photosynthesis a scoring chapter for NEET?
Yes. Two to three questions usually come from it and most are direct NCERT facts about sites, pigments and pathways.
How do I stop forgetting the C3 and C4 differences?
Take the chapter test in the app; weak chapters come back automatically on Day 1, 3, 8 and 20 until the answers stick.