Ch. 6 Test- Photosynthesis, Cellular Respiration, Mitosis

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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7. How does a human body get energy?

• Sunlight on the skin produces energy.

• Water provides the majority of energy.

• Food and oxygen combine to deliver energy

• Sleep provides energy stored at night for the next day.

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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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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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Which of the following BEST describes the flow of energy in a cabbage plant?

• Chemical energy is absorbed by mitochondria, stored in sugars, and released in chloroplasts.

• Chemical energy is absorbed by chloroplasts, stored in sugars, and released in mitochondria.

• Solar energy is absorbed by chloroplasts, converted and stored in sugars, and released in mitochondria.

• Solar energy is absorbed by mitochondria, converted and stored in sugars, and released in chloroplasts.

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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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