AP Biology Unit 3 Photosynthesis

Front

What is the Calvin cycle?

Back

The Calvin cycle is a series of biochemical reactions that take place in the stroma of chloroplasts in photosynthetic organisms, where carbon dioxide is converted into glucose using ATP and NADPH.

Front

How many turns of the Calvin cycle are required to produce one G3P molecule?

Back

3 turns of the Calvin cycle are required to synthesize one G3P molecule.

Front

What is G3P and its significance in photosynthesis?

Back

G3P (glyceraldehyde-3-phosphate) is a three-carbon sugar produced in the Calvin cycle, which can be used to form glucose and other carbohydrates.

Front

What are the main inputs of the Calvin cycle?

Back

The main inputs of the Calvin cycle are carbon dioxide (CO2), ATP, and NADPH.

Front

What is the output of the Calvin cycle?

Back

The output of the Calvin cycle is G3P.

Front

Where does the Calvin cycle occur in the plant cell?

Back

The Calvin cycle occurs in the stroma of chloroplasts.

Front

What role does NADPH play in the Calvin cycle?

Back

NADPH provides the reducing power (electrons) needed for the conversion of 3-PGA to G3P in the Calvin cycle.

Front

What is the role of ATP in the Calvin cycle?

Back

ATP provides the energy required for the conversion of 3-PGA to G3P and for the regeneration of ribulose bisphosphate (RuBP) in the Calvin cycle.

Front

What are the light reactions in photosynthesis?

Back

The light reactions are the first stage of photosynthesis, occurring in the thylakoid membranes, where light energy is converted into chemical energy in the form of ATP and NADPH.

Front

Describe the pathway of electrons in the light reactions of photosynthesis.

Back

The pathway of electrons in the light reactions is: O2 → PS II → PS I → NADPH.