Photosynthesis Review

What is the primary function of the light-dependent reactions in photosynthesis?

• To produce glucose

• To convert solar energy into chemical energy in the form of ATP and NADPH

• To fix carbon dioxide into organic molecules

• To release oxygen as a by-product

Which pigment is primarily responsible for absorbing light energy during photosynthesis?

• Carotenoids

• Chlorophyll a

• Xanthophylls

• Anthocyanins

In which part of the chloroplast do the light-dependent reactions occur?

• Stroma

• Thylakoid membrane

• Outer membrane

• Inner membrane

What is the role of water in the light-dependent reactions?

• It acts as a carbon source

• It provides electrons through photolysis

• It is a product of the Calvin Cycle

• It absorbs light energy

Which molecule is the final electron acceptor in Photosystem I?

• Oxygen

• ATP

• Carbon dioxide

What is the first stable product of carbon fixation in the Calvin Cycle?

• Glucose

• Ribulose bisphosphate (RuBP)

• 3-phosphoglycerate (3-PGA)

• Glyceraldehyde-3-phosphate (G3P)

Which enzyme is responsible for carbon fixation in the Calvin Cycle?

• ATP synthase

• RuBisCO

• Phosphoglycerate kinase

How many molecules of ATP and NADPH are required to produce one molecule of glucose in the Calvin Cycle?

• 6 ATP and 6 NADPH

• 12 ATP and 12 NADPH

• 18 ATP and 12 NADPH

• 24 ATP and 18 NADPH

Which of the following factors does NOT directly affect the rate of photosynthesis?

• Light intensity

• Carbon dioxide concentration

• Oxygen concentration

What is the main purpose of the Calvin Cycle?

• To produce ATP and NADPH

• To convert carbon dioxide into glucose

• To release oxygen

• To absorb light energy