Which statement describes the functioning of photosystem II?
The P680 chlorophyll donates a pair of protons to NADPH, which is thus converted to NADP+
The excitation is passed along to a molecule of P700 chlorophyll in the photosynthetic unit.
Light energy excites electrons in the electron transport chain in a photosynthetic unit.
The electron vacancies in P680 are filled by electrons derived from water.
What is the role of the electron transport system in the light-dependent pathway of photosynthesis
production of carbon dioxide and water molecules
production of NADPH molecules
production of oxygen molecules
production of glucose molecules
Light-driven electron transport in the chloroplast pumps H+ into the intermembrane space between the outer and inner membranes.
In the above schematic diagram, what is plastocyanin?
- Metallo flavoprotein
- Fe containing porphyrin pigment
I. P+680 is the P680 molecule that lost its electron. It has the maximum reduction potential.
II. P∗680 is the excited P680 molecule after absorption of the light energy. It has the lowest reduction potential
III. Final electron acceptor of PS I is Fe-S centre
IV. Flow of high energy electron in the electron transport chain creates a pH difference between the chloroplast stroma and thylakoid lumen
- Only I
- I and IV
- III and IV
- II, III and IV