Chapter 169 of 2363 min read

Light reaction: photosystems, electron transport, photophosphorylation

Why this is asked: Cyclic photophosphorylation runs on Photosystem I alone, cycling electrons back to the same photosystem — so it produces ATP only, with no NADPH and no oxygen evolved, since splitting water is strictly a Photosystem II job.

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Test yourself

•Match List I with List II.
List I List II
A. Chlorophyll a I. Yellow-green
B. Chlorophyll b II. Yellow
C. Xanthophylls III. Blue-green
D. Carotenoids IV. Yellow to yellow-orange
Choose the option with all correct matches:

List I	List II
A. Chlorophyll a	I. Yellow-green
B. Chlorophyll b	II. Yellow
C. Xanthophylls	III. Blue-green
D. Carotenoids	IV. Yellow to yellow-orange

Open this in the full syllabus view · Botany

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