Photosynthesis in Plants Answers

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How is the process of carbon fixation in CAM plants different from the process in C3 and C4 plants?

CAM plants require a larger exchange of gases in the atmosphere than C3 and C4 plants.

CAM plants are better adapted for moist, low light areas than C3 and C4 plants.

CAM plants conserve water by allowing transpiration to occur at night rather than the day like it does with C3 and C4 plants.

All of the above

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Photosynthesis occurs when _______.

plants absorb energy from carbon dioxide

plants absorb energy from sunlight

oxygen concentration in the atmosphere increases

all of the above

Which of the following statements about the dark reactions is true?

Dark reactions occur in the thylakoids of chloroplasts.

Light energy is converted to chemical energy during the dark reactions.

Carbon dioxide is converted to sugar using ATP and NADPH during the dark reactions.

All of the above

Which of the following types of carbon fixation is associated with plant stomata being open during the night?

CAM

all of the above

Which of the following is not necessary for a plant to carry out photosynthesis?

carbon dioxide

water

oxygen

sunlight

Different types of plants use different types of carbon fixation as adaptations to varying conditions.

Photosynthesis is vital for maintaining levels of atmospheric oxygen.

Which of the following plant structures provides most of the water necessary for photosynthesis?

roots

leaves

chloroplasts

stomata

How does the carbon dioxide necessary for photosynthesis enter plants?

through their roots

through openings in the leaves called stomata

the plants produce their own complete supply

none of the above

The _______ in plants is directly responsible for absorbing light energy.

stroma

thylakoid

grana

chlorophyll

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