AP Biology Photosynthesis

Front

What are the two main stages of photosynthesis?

Back

The two main stages of photosynthesis are the light reactions and the Calvin cycle.

Front

Where do the light reactions of photosynthesis occur?

Back

The light reactions occur in the thylakoid membranes of the chloroplasts.

Front

What is the primary purpose of the light reactions?

Back

The primary purpose of the light reactions is to convert solar energy into chemical energy in the form of ATP and NADPH.

Front

What is chemiosmosis in the context of photosynthesis?

Back

Chemiosmosis is the process by which ATP is produced in the light reactions using the H+ concentration gradient across the thylakoid membrane.

Front

What are the products of the light reactions that are used in the Calvin cycle?

Back

The products of the light reactions used in the Calvin cycle are ATP and NADPH.

Front

What role does Photosystem I play in photosynthesis?

Back

Photosystem I is involved in receiving electrons from the thylakoid membrane electron transport chain and helps in the production of NADPH.

Front

What is the source of carbon used to form glucose in photosynthesis?

Back

The source of carbon used to form glucose is CO2 from the air.

Front

What is the significance of the H+ concentration gradient in photosynthesis?

Back

The H+ concentration gradient is significant because it drives ATP synthesis during chemiosmosis.

Front

What is the function of chlorophyll in photosynthesis?

Back

Chlorophyll is a pigment that absorbs light energy, primarily in the blue and red wavelengths, and is essential for the light reactions.

Front

What is the Calvin cycle?

Back

The Calvin cycle is the set of light-independent reactions in photosynthesis that convert CO2 and other compounds into glucose.