Photosynthesis and the Calvin Cycle Quiz

What are the main products of the light reaction in photosynthesis?

• Carbon dioxide and water

• ATP and NADPH

• Chlorophyll and sunlight

• Glucose and oxygen

What is the Calvin cycle also known as?

• Light reaction

• Dark reaction

• Light-independent reaction

• Photosynthetic reaction

Why is the term 'dark reaction' considered a misnomer for the Calvin cycle?

• It is unrelated to photosynthesis

• It does not require light directly

• It occurs only at night

• It produces darkness

Which enzyme is crucial for the carboxylation phase of the Calvin cycle?

• Chlorophyll

• NADP reductase

• Rubisco

• ATP synthase

What is the main function of the enzyme Rubisco?

• To produce ATP

• To fix carbon dioxide

• To split water molecules

• To absorb sunlight

During the reduction phase of the Calvin cycle, what is phosphoglyceric acid converted into?

• Glucose

• Ribulose bisphosphate

• Glyceraldehyde-3-phosphate

• Carbon dioxide

What is the role of NADPH in the Calvin cycle?

• It carries electrons

• It regenerates RuBP

• It acts as an energy source

• It fixes carbon dioxide

Which phase of the Calvin cycle involves the conversion of G3P into glucose?

• Light reaction

• Regeneration phase

• Reduction phase

• Carboxylation phase

What is the purpose of the regeneration phase in the Calvin cycle?

• To fix carbon dioxide

• To produce ATP

• To regenerate RuBP

• To produce oxygen

How many turns of the Calvin cycle are needed to produce one molecule of glucose?

• Twelve

• Nine

• Six

• Three