AP Biology - Photosynthesis

Front

What is chlorophyll and why do most plants appear green?

Back

Chlorophyll is a green pigment found in plants that absorbs light energy for photosynthesis. Most plants appear green because chlorophyll does not absorb green light, reflecting it instead.

Front

What are the main products of photosynthesis?

Back

The main products of photosynthesis are glucose and oxygen.

Front

From where do plants obtain the energy needed for photosynthesis?

Back

Plants obtain the energy needed for photosynthesis from sunlight.

Front

What is NADPH and its role in photosynthesis?

Back

NADPH is a substance produced in the light-dependent reactions of photosynthesis and serves as a source of energy for the light-independent reactions (Calvin cycle).

Front

What is the primary source of energy for all life on Earth?

Back

The primary source of energy for all life on Earth comes from the sun.

Front

What is the process of 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

What role does water play in photosynthesis?

Back

Water is a reactant in photosynthesis that provides electrons and protons, and it is split during the light-dependent reactions to release oxygen.

Front

What is the significance of the Calvin cycle?

Back

The Calvin cycle is significant because it uses ATP and NADPH produced in the light-dependent reactions to convert carbon dioxide into glucose.

Front

How does light intensity affect the rate of photosynthesis?

Back

Increased light intensity generally increases the rate of photosynthesis up to a certain point, after which other factors may become limiting.