Photosynthesis Light Reaction

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water.

Front

What are the two main stages of photosynthesis?

Back

The two main stages of photosynthesis are the light-dependent reactions and the light-independent reactions (Calvin cycle).

Front

Where do the light-dependent reactions occur?

Back

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

Front

What is the role of sunlight in photosynthesis?

Back

Sunlight provides the energy needed to drive the light-dependent reactions, which produce ATP and NADPH.

Front

What is the significance of water in the light-dependent reactions?

Back

Water is split to provide electrons (e-) and protons (H+) for the light-dependent reactions, and oxygen is released as a byproduct.

Front

What is the function of chlorophyll?

Back

Chlorophyll is the pigment in chloroplasts that absorbs light energy, primarily in the blue and red wavelengths, to facilitate photosynthesis.

Front

What is NADP+ and its role in photosynthesis?

Back

NADP+ is an electron carrier that accepts electrons during the light-dependent reactions, becoming NADPH, which is used in the Calvin cycle.

Front

What is the Calvin cycle?

Back

The Calvin cycle is the light-independent stage of photosynthesis where carbon dioxide is fixed into glucose using ATP and NADPH produced in the light-dependent reactions.

Front

What is the byproduct of water splitting in photosystem II?

Back

The byproduct of water splitting in photosystem II is oxygen (O2), which is released into the atmosphere.

Front

How does ATP synthase function in photosynthesis?

Back

ATP synthase is an enzyme that synthesizes ATP from ADP and inorganic phosphate, using the proton gradient created during the light-dependent reactions.