AP Bio: Photosynthesis

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 reactions and the Calvin cycle.

Front

Where do the light reactions of photosynthesis occur?

Back

The light reactions occur in the thylakoid membranes of chloroplasts.

Front

What is the primary pigment involved in photosynthesis?

Back

The primary pigment involved in photosynthesis is chlorophyll.

Front

What is the role of NADP+ in photosynthesis?

Back

NADP+ acts as an electron carrier, accepting electrons during the light reactions to form NADPH.

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 reactions to convert carbon dioxide into glucose.

Front

What is photorespiration?

Back

Photorespiration is a process that occurs when the enzyme RuBisCO fixes oxygen instead of carbon dioxide, leading to a decrease in photosynthetic efficiency.

Front

How do C3 plants differ from C4 plants in photosynthesis?

Back

C3 plants fix carbon dioxide directly in the Calvin cycle, while C4 plants first fix carbon dioxide into a four-carbon compound before entering the Calvin cycle.

Front

What environmental conditions increase the risk of photorespiration in C3 plants?

Back

Hot and dry conditions increase the risk of photorespiration in C3 plants.

Front

What is the function of chlorophyll a?

Back

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