Photosynthesis

What are organisms that use energy from the sun or chemicals to make organic compounds called?

• Heterotrophs

• Carotenoids

• Autotrophs

• Chloroplasts

Which process do most autotrophs use to convert light energy from the sun into chemical energy?

• Cellular respiration

• Fermentation

• Photosynthesis

• Chemosynthesis

What are the two main parts of photosynthesis?

• Light reactions and Calvin Cycle

• Glycolysis and Fermentation

• Krebs cycle and Electron Transport Chain

• NADPH production and ATP synthesis

Where does the absorption of light occur in the chloroplast?

• Within the mitochondria

• In the stroma

• In the chlorophyll

• In the thylakoids

What is the role of chlorophyll in photosynthesis?

• It releases oxygen

• It produces glucose

• It absorbs light energy

• It splits water molecules

Which molecule acts as the primary electron acceptor during the light reactions of photosynthesis?

• CO2

• A molecule in the thylakoid membrane

• ATP

• NADPH

What is the purpose of the Calvin Cycle?

• To produce ATP and NADPH

• To absorb light energy

• To produce organic molecules in the form of sugars

• To release oxygen

What happens to CO2 in the Calvin Cycle?

• It is converted into ATP

• It is used to produce NADPH

• It is expelled as a waste product

• It is fixed into organic compounds

Which pathway do plants in hot/dry climates use to fix carbon?

• Glycolysis

• The CAM pathway

• The C4 Pathway

• The Calvin Cycle

What factors affect the rate of photosynthesis?

• Light Intensity, CO2 Levels, and Temperature

• ATP availability, NADPH levels, and Calvin Cycle speed

• Oxygen levels, Water availability, and Soil nutrients

• Chlorophyll concentration, Stomata size, and Plant age