Photosynthesis

What happens during photosynthesis?

• Heterotrophs produce ATP

• Heterotrophs consume ATP.

• Autotrophs consume carbohydrates.

• Autotrophs produce carbohydrates.

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In the autumn, the green leaves of sugar maples turn orange. Which explanation is true?

• The leaves increase their production of carotenoids to adjust to the autumn light.

• The colors of carotenoids are no longer masked by the color of chlorophyll.

• The autumn light has more orange wavelengths than the summer light has.

• The autumn light lacks the blue and orange-red wavelengths found in the summer light.

Which of the following is NOT a true statement about ATP?

• Used ATP is discarded by the cell as waste.

• ATP provides energy for the mechanical functions of cells.

• ATP consists of ribose, adenine, and three phosphate groups.

• ADP is produced when ATP releases energy.

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Plants gather the sun’s energy using molecules called...

• glucose

• chloroplasts

• thylakoids.

• pigments

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Organisms, such as plants, that make their own food are called..

• heterotrophs

• autotrophs

• thylakoids

• pigments

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Energy is released from ATP when...

• a phosphate group is added

• adenine bonds to ribose

• ATP is exposed to sunlight

• a phosphate group is removed

Photosynthesis uses sunlight to convert water and carbon dioxide into..

• oxygen and carbon.

• high-energy sugars and proteins

• ATP and oxygen

• oxygen and high-energy sugars

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Plants get the energy they need for photosynthesis by absorbing

• high-energy sugars

• chlorophyll a

• energy from the sun.

• chlorophyll b

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Most plants appear green because chlorophyll...

• absorbs violet light.

• absorbs green light.

• does not absorb green light.

• does not absorb violet light.

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The stroma is the region outside the

• chloroplasts

• thylakoids

• plant cells

• all of the above