Prepare for NEET Biology Photosynthesis in Higher Plants with MCQs & PYQs on NEET.GUIDE. Get free practice, previous year questions, and expert guidance to grasp light and dark reactions.
During the light-dependent reactions of photosynthesis, plastoquinone (PQ) transfers electrons from:
Oxygen-evolving complex to Photosystem II
Photosystem II to cytochrome b6f complex
Cytochrome b6f complex to Photosystem I
Photosystem I to NADP+
Plastoquinone functions in the light-dependent reactions by:
Accepting electrons from Photosystem I
Donating electrons to Photosystem I
Carrying electrons from Photosystem II to the cytochrome b6f complex
Splitting water molecules
Which of the following correctly describes the role of plastoquinone (PQ) in the light-dependent reactions of photosynthesis?
It transfers electrons from Photosystem II to the cytochrome b6f complex.
It transfers electrons from Photosystem I to Photosystem II.
It is oxidized by Photosystem II and reduced by the cytochrome b6f complex.
It splits water molecules to release electrons.
If plastoquinone (PQ) is inhibited in a plant cell, which of the following processes would be directly affected in the light-dependent reactions?
Water splitting at the oxygen-evolving complex
Light absorption by Photosystem II
NADP+ reduction
Electron flow from Photosystem II to the cytochrome b6f complex
In the electron transport chain of photosynthesis, the molecule immediately receiving electrons from plastoquinone (PQ) is:
Photosystem II
Plastocyanin
Cytochrome b6f complex
Ferredoxin
Oxygen is NOT produced during photosynthesis by
Green sulfur bacteria
Cyanobacteria
Algae
Higher plants
Which of the following organisms utilizes a different electron donor than water during photosynthesis, resulting in no oxygen production?
Algae
Ferns
Mosses
Purple sulfur bacteria
