BioInteractive Light Reactions of Photosynthesis 2

Question 1

What process uses the proton gradient across the thylakoid membrane to synthesize ATP?

Accepted Answer

Chemiosmosis

Answer

Glycolysis

Answer

Oxidative phosphorylation

Answer

Substrate-level phosphorylation

Question 2

Which complex in the thylakoid membrane splits water and releases O2?

Accepted Answer

Oxygen-evolving complex

Answer

ATP synthase

Answer

NADP+ reductase

Answer

Cytochrome b6f

Question 3

What happens to electrons after they leave Photosystem II?

Accepted Answer

They pass through the electron transport chain to Photosystem I

Answer

They combine with CO2

Answer

They are used to split water

Answer

They directly produce glucose

Question 4

What role does plastoquinone play in the light reactions?

Accepted Answer

Electron carrier between Photosystem II and cytochrome b6f

Answer

Light absorber

Answer

ATP producer

Answer

Carbon fixer

Question 5

What is the function of ferredoxin in the light reactions?

Accepted Answer

Transfer electrons from Photosystem I to NADP+ reductase

Answer

Split water molecules

Answer

Absorb red light

Answer

Synthesize ATP

Question 6

How many photons are required to produce one O2 molecule from water splitting?

Accepted Answer

8

Answer

2

Answer

4

Answer

6