Biology · Class 11 · Chapter 11
Photosynthesis in Higher Plants
12 lessons 93 min 1 simulations 10 practice questions
This chapter explains how green plants capture light energy and store it as chemical energy in sugar. It moves from the classic experiments that revealed the process, through the pigments and the light-driven reactions in the thylakoids, to CO₂ fixation in the stroma by the C₃ and C₄ routes, photorespiration, and the factors that limit the rate.
What the exam asks
NEET questions lean on the historical experiments, the two photosystems and their reaction centres, cyclic versus non-cyclic photophosphorylation, where protons build up in the chemiosmotic model, the ATP and NADPH bookkeeping of the Calvin cycle, and C₃ versus C₄ contrasts. Students most often lose marks by swapping PS I and PS II, by placing the proton gradient on the wrong side of the thylakoid, and by mixing up first products and primary acceptors.
Lessons
12 lessons · 93 min
1What do we know about photosynthesisNCERT §11.17 min2Early experimentsNCERT §11.29 min3Where photosynthesis takes placeNCERT §11.37 min4Pigments involved in photosynthesisNCERT §11.47 min5The light reaction and the photosystemsNCERT §11.56 min6Electron transport, splitting of water and photophosphorylationNCERT §11.6–§11.6.27 min7Chemiosmotic hypothesis of ATP synthesisNCERT §11.6.36 min8Use of ATP and NADPH: the Calvin cycle (C₃ pathway)NCERT §11.7–§11.7.27 min9The C₄ pathwayNCERT §11.87 min10PhotorespirationNCERT §11.96 min11Factors affecting photosynthesisNCERT §11.1011 min 1 sim12Chapter reviewMust-know facts, traps and formulas13 min