AP Bio Photosynthesis

Front

What is the primary process driven by light energy in photosynthesis?

Back

The removal of electrons from membrane-bound chlorophyll molecules.

Front

What is released as a direct by-product of splitting water molecules during photosynthesis?

Back

Oxygen.

Front

Where do the electrons that are lost in Photosystem I (PS I) come from?

Back

The electrons from Photosystem II (PS II).

Front

What are the main products of the light-dependent reactions of photosynthesis?

Back

ATP, NADPH, and Oxygen.

Front

Which of the following does NOT contribute to ATP production during the light reactions? NADPH donating electrons, light energy, or proton gradient?

Back

NADPH donating electrons.

Front

What role does chlorophyll play in photosynthesis?

Back

Chlorophyll absorbs light energy and initiates the process of photosynthesis by removing electrons.

Front

What is the function of NADPH in photosynthesis?

Back

NADPH serves as a reducing agent, providing electrons for the Calvin cycle.

Front

What is the significance of the proton gradient in the light-dependent reactions?

Back

The proton gradient drives ATP synthesis through ATP synthase.

Front

How does light energy affect the electron transport chain in photosynthesis?

Back

Light energy excites electrons in chlorophyll, initiating the electron transport chain.

Front

What is the role of water in the light-dependent reactions of photosynthesis?

Back

Water is split to provide electrons and protons, releasing oxygen as a by-product.