Photosynthesis: The Calvin Cycle Quiz

What is the primary role of the Calvin cycle in photosynthesis?

• To convert carbon dioxide into sugar

• To release oxygen

• To absorb water

• To capture sunlight

During the carbon fixation step, what enzyme is responsible for adding carbon to ribulose bisphosphate (RuBP)?

• Rubisco

• NADPH oxidase

• Phosphofructokinase

• ATP synthase

How many molecules of glyceraldehyde 3-phosphate (G3P) are produced for every three molecules of carbon dioxide that enter the Calvin cycle?

• Two

• Four

• Six

• Eight

What is the significance of glyceraldehyde 3-phosphate (G3P) in the Calvin cycle?

• It is a direct product of photosynthesis

• It is a precursor to glucose

• It is used to regenerate ATP

• It releases oxygen

Why are both the light-dependent and light-independent reactions necessary for photosynthesis?

• To produce oxygen

• To convert water into hydrogen

• To synthesize sugar from carbon dioxide

• To absorb sunlight