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15 Questions

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Photosystem II and Photosystem I

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Questions and Answers

What is the first electron donor in oxygenic photosynthesis?

Oxygen

Nitrogen

Carbon dioxide

Water (correct)

What is the main process by which plants acquire energy?

Respiration

Photosynthesis (correct)

Fermentation

Digestion

What does photosystem I (PSI) convert NADP+ into?

NADPH (correct)

H2O

ATP

What does cytochrome b6f and ATP synthase produce together?

ATP Signup and view all the answers

In non-cyclic photophosphorylation, where does cytochrome b6f pump protons from and to?

From the stroma to the lumen Signup and view all the answers

What is the primary function of chlorophyll fluorescence in photosynthetic organisms?

It is an indicator of photosynthetic energy conversion Signup and view all the answers

Which of the following processes does excited chlorophyll use to dissipate absorbed light energy?

All of these Signup and view all the answers

What is the Kautsky effect?

A rapid rise in fluorescence from Photosystem II Signup and view all the answers

Which photosystem is responsible for the variable rise in chlorophyll fluorescence?

Photosystem II Signup and view all the answers

What type of fluorescence does Photosystem I exhibit?

Constant fluorescence Signup and view all the answers

What is the function of chlorophyll fluorescence?

It is an indicator of photosynthetic energy conversion Signup and view all the answers

Which process is NOT a way that excited chlorophyll dissipates the absorbed light energy?

Through respiration Signup and view all the answers

What is the Kautsky effect related to?

The rapid rise in fluorescence from Photosystem II Signup and view all the answers

What is the characteristic of the fluorescence from Photosystem I?

It is constant Signup and view all the answers

What causes the increase in fluorescence in the Kautsky effect?