Photosynthesis and Cellular Respiration Review

1. What is chlorophyll and how does it help plants?

• A.Chlorophyll is a pigment that absorbs light energy and makes glucose.

• B.Chlorophyll is a protein that changes shape in the presence of sunlight.

• C.Chlorophyll is a receptor that binds carbon dioxide when energized by light

• D.Chlorophyll is an enzyme that catalyzes the production of glucose when exposed to light.

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Which type of organism would MOST likely benefit directly from increased levels of CO2?

• mushroom

• tree

• bird

• fish

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Which of the following is produced during the process of cellular respiration?

• carbon dioxide

• sodium chloride

• oxygen

• sugar

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Which two things are produced when a plant breaks down sugar to release energy?

• oxygen and food

• carbon dioxide and food

• oxygen and carbon dioxide

• carbon dioxide and water

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If a single-celled organism that uses photosynthesis has its source of light removed, it will

• divide repeatedly.

• produce less energy.

• grow in size.

• generate more waste.

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Which process is considered to be a part of the carbon cycle?

• precipitation

• metamorphosis

• condensation

• photosynthesis

How will clear-cutting of forests affect the level of carbon dioxide in the atmosphere?

• It will decrease because of increased respiration.

• It will increase because of decreased photosynthesis.

• It will decrease because of decreased photosynthesis.

• It will remain constant as respiring animals remove the carbon dioxide.

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Which statement accurately describes an interaction between plants and animals?

• Animals release CO2, required for photosynthesis.

• Animals release O2, required for plant survival.

• Plants provide humans with atmospheric nitrogen.

• Plants provide humans with CO2 for respiration.

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6. Which of the following represents the process of photosynthesis?

• C6H12O6+6O2→6CO2+6H2O

• 6CO2+6H2O→C6H12O6+6O2

• 2H2O→2H2+O2

• 2H2+O2→2H2O

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People take in and release gases from the air when they breathe. Which exhaled gas is a waste product of respiration?

• helium

• oxygen

• carbon dioxide

• hydrogen

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