Photosynthesis Fundamentals for Ninth Graders

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

• To produce glucose

• To convert ADP into ATP and NADP+ into NADPH

• To break down carbon dioxide

• To absorb water from the soil

Which of the following is the correct balanced equation for photosynthesis?

• 6CO2 + 6H2O → C6H12O6 + 6O2

• C6H12O6 + 6O2 → 6CO2 + 6H2O

• 6CO2 + C6H12O6 → 6O2 + 6H2O

• 6O2 + 6H2O → 6CO2 + C6H12O6

Which component is NOT a product of the light-dependent reactions?

• Oxygen

• ATP

• Glucose

• NADPH

What is the role of chlorophyll in photosynthesis?

• It helps in the absorption of water

• It captures light energy

• It converts glucose into energy

• It stores ATP

Which factor does NOT affect the rate of photosynthesis?

• Light intensity

• Carbon dioxide concentration

• Oxygen concentration

• Temperature

Where in the plant cell do the light-dependent reactions take place?

• Mitochondria

• Chloroplast thylakoids

• Nucleus

• Ribosomes

What is the main purpose of the Calvin cycle in photosynthesis?

• To produce ATP

• To produce NADPH

• To convert CO2 into glucose

• To release oxygen

Which gas is taken in by plants during photosynthesis?

• Oxygen

• Nitrogen

• Carbon dioxide

• Argon

What happens to the oxygen produced during photosynthesis?

• It is used in the Calvin cycle

• It is expelled as a waste product

• It is used to break down glucose

• It is stored in the chloroplasts

How does an increase in light intensity affect photosynthesis, up to a certain point?

• It decreases the rate of photosynthesis

• It has no effect on the rate of photosynthesis

• It increases the rate of photosynthesis

• It stops the photosynthetic process