Question

The sequential order in electron transport from PS II to PS I of photosynthesis is

• A. FeS, PQ, PC and Cytochrome
• B. FeS, PQ. Cytochromes and PC
• C. PQ, Cytochromes, PC and FeS
• D. PC, Cytochromes, FeS, PQ

Answer 1

Answer: (C)

PQ, Cytochromes, PC and FeS

In electron transport process the excited electron from P${}_{680}$ (PS II) is accepted by primary acceptor quinone, which sends them to an electron transport system consisting of plastoquinone, cytochrome complex and plastocyanin.

The excited electron absorbed by P${}_{700}$ (PS I) reaction centre, then transfer to the ferredoxin (Fe), then the reduced Ferredoxin donates the electron to NADP${}^{+}$.

The ${NADP}^{+}$ take an electron from ferredoxin, protons from the medium and get reduced to NADPH in presence of enzyme ferredoxin- NADP- reductase.

Hence, the correct answer is 'PQ, cytochromes, PC and FeS'.