Photosynthesis Quiz

Where do the light-dependent reactions occur?

What is the source of the electrons in the electron transport chain?

How are electrons that are released from the water molecules used?

What role do these electrons play?

What two energy carriers are produced?

• NADPH

• ATP

At what two points in the process are electrons used in the transfer of energy?

• In photosystem II, electrons provide energy to transport hydrogen ions across the thylakoid membrane.

• In photosystem I, electrons are used to produce NADPH.

Where in the chloroplast do light-independent reactions occur?

Where are the ATP and NADPH coming from?

Why are these reactions called a cycle?

Why must the Calvin cycle occur more than once to build a sugar molecule?