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Photosynthesis Chapter 6: Photolysis and Photophosphorylation

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Photosynthesis Chapter 6: Photolysis and Photophosphorylation

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Questions and Answers

What is the main purpose of photolysis of water in photosynthesis?

To produce ATP and NADPH + H+

To replace electrons in photosystem II (correct)

To release oxygen into the air and hydrogen ions into the thylakoid space

To add phosphate to ADP to form ATP

Which pigment is photoactivated in the reaction center of photosystem II?

Primary electron acceptor

Phaeophytin

Accessory pigments

Chlorophyll a P680 (correct)

What is the primary role of non-cyclic photophosphorylation in photosynthesis?

Splitting water molecules using light

Produce ATP, NADPH + H+, and O2 (correct)

Releasing hydrogen ions into the thylakoid space

Replacing electrons in photosystem II

What happens to the hydrogen ions released into the thylakoid space during photosynthesis?

They are involved in the formation of ATP via chemiosmosis Signup and view all the answers

What is the function of the electron transport chain in photosynthesis?

Releasing energy for ATP synthesis Signup and view all the answers

What is the role of plastocyanin (Pc) in the electron transport chain?

Receiving electrons from the primary electron acceptor in PS I Signup and view all the answers

What is the ultimate product of the electron transport chain in photosynthesis?

NADPH + H+ Signup and view all the answers

Where does the electron released from the P700 in PS I go next?

It is received by primary electron acceptor Signup and view all the answers

Study Notes

Photolysis of Water in Photosynthesis

The main purpose of photolysis of water in photosynthesis is to produce ATP and NADPH.

Photosystem II

The pigment that is photoactivated in the reaction center of photosystem II is P680.

Non-Cyclic Photophosphorylation

The primary role of non-cyclic photophosphorylation in photosynthesis is to generate ATP and NADPH.

Thylakoid Space

The hydrogen ions released into the thylakoid space during photosynthesis create a proton gradient used to drive ATP synthesis.

Electron Transport Chain

The function of the electron transport chain in photosynthesis is to generate a proton gradient used to drive ATP synthesis.

Plastocyanin (Pc)

The role of plastocyanin (Pc) in the electron transport chain is to transfer electrons from cytochrome b6f to photosystem I.

Electron Transport Chain Product

The ultimate product of the electron transport chain in photosynthesis is ATP.

Photosystem I (PS I)

The electron released from the P700 in PS I goes next to plastocyanin (Pc).

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Description

This quiz covers the concepts of photolysis of water and photophosphorylation in the context of photosynthesis. It includes information about the process of splitting water molecules using light, the significance of photolysis, and the mechanism of ATP formation using sunlight energy.