Photosynthesis

What is the primary site of photosynthesis in eukaryotic cells?

• Mitochondria

• Nucleus

• Chloroplast

• Ribosome

What are the main pigments involved in photosynthesis?

• Cytochromes

• Hemoglobin

• Myoglobin

• Chlorophyll A and B

Which color of light is least absorbed by plants?

• Blue

• Red

• Green

• Violet

What is the main purpose of the light-dependent reactions in photosynthesis?

• To create oxygen only

• To produce glucose

• To absorb carbon dioxide

• To generate ATP and NADPH

What molecule acts as the initial electron donor in the light-dependent reactions?

• Carbon dioxide

• Water

• Oxygen

• Glucose

What does the Calvin cycle primarily produce?

• ATP

• Carbon dioxide

• Oxygen

• Glucose

What is the role of rubisco in the Calvin cycle?

• It produces oxygen

• It splits water molecules

• It generates ATP

• It fixes carbon dioxide into an organic molecule

What triggers photorespiration in plants?

• High levels of glucose

• Low levels of carbon dioxide

• Low levels of ATP

• High levels of oxygen

Which adaptation helps CAM plants minimize water loss?

• Opening stomata at night

• Closing stomata at night

• Increasing leaf thickness

• Decreasing root depth

What is the primary function of the C4 pathway in plants?

• To enhance sugar production

• To reduce water usage

• To efficiently fix carbon dioxide

• To produce more ATP