Chapter 8 Biology

Where within the cell does photosynthesis take place?

• cytoplasm

• chloroplasts

• mitochondria

• nucleus

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Which of the following can be used to measure the rate of photosynthesis?

• light intensity (%)

• oxygen production (mL/hr)

• temperature

• CO₂ level

According to the graph below, what temperature will result in the highest rate of photosynthesis?

• 5

• 40

• 30

• 25

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Based on what you have observed in the Gizmo, which of the following chemical equations represents photosynthesis?

• Carbon dioxide plus water yields glucose (sugar) and oxygen

• Oxygen plus carbon dioxide yields water and glucose.

• Glucose plus oxygen yields carbon dioxide and water.

• Water plus glucose yields oxygen and carbon dioxide.

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If chlorophyll were red instead of green, making plants red in appearance, which color of light would you expect to produce the LOWEST rate of photosynthesis?

• white

• blue

• red

• green

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The major products of the light-dependent reactions are

• ATP & NADPH

• NADPH & water

• carbon dioxide & water

• ATP & sugars

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In photosynthesis, carbon dioxide is used to make sugars during

• ATP formation

• Calvin Cycle

• light-dependent reactions

• electron transport chain

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What is the function of NADPH and ATP in the Calvin cycle?

• they provide the energy required to build high-energy sugars

• they provide energy to create needed oxygen

• they provide energy to expel CO₂

• they provide enough energy for it to be stored for long periods

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How do CAM plants photosynthesize under bright hot conditions without drying out?

• by allowing small openings in their leaves to admit more carbon dioxide

• by lowering the amount of ATP required for the Calvin cycle

• by using the C4 pathway

• by sealing their leaves against water loss & trapping carbon as organiz acids

The reactants of photosynthesis are

• CO₂ & H₂O

• CO₂ & H₂

• C & O₂

• C & H₂

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