What would happen to the concentrations of ATP, NADPH and Sugars if PSII stopped working? ATP - decrease, stay the same, increase
NADPH - decrease, stay the same, increase
sugars - decrease, stay the same, increase

What would happen to the concentrations of ATP, NADPH and Sugars if Photosystem II (PSII) stopped working is a: decrease.

During photosynthesis, the primary acceptor of carbon are Photosystem I (PSI) and Photosystem II (PSII) because it occurs in a light-dependent reaction.

Photosystem II (P680) is a large membrane protein complex which serves as a primary acceptor of carbon during a light-dependent reaction.

However, the following would happen when the Photosystem II (P680) stops working:

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1. ATP - decrease

2.NADPH - decrease

3. sugars - decrease

Explanation:

Photosynthesis is a type of biosynthesis that produces glucose from the reactants: sunlight, carbon dioxide, and water. It occurs in the chloroplast in two phases, the light-dependent, and light-independent/dark reactions where sugars are made. Pigments like chlorophyll absorb light energy at specific wavelengths in the light reaction which activates photosystems

Here:

The NADPH is integral to the Calvin Cycle, as part of the light independent reactions- these synthesize sugar molecules.

If PS II no longer works,  there will be less ATP, NADPH, and no sugars produced.

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