AP Biology Campbell Chapter 8

When human muscles are exercised and oxygen is depleted, the muscles can continue to produce energy by?

• taking oxygen from other cells and continuing aerobic respiration

• breaking down fatty acids

• increasing speed of the reactions in the Krebs Cycle

• using fermentation reactions to facilitate glycolysis

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Which of the following represents a possible pathway of electrons through cellular respiration?

• Glucose-Pyruvate-Acetyl-CoA-FADH2-oxygen

• Glucose-NADH-electron transport chain-Acetyl-CoA-oxygen

• Glucose-PyruvateÆelectron transport chain-NADH-Acetyl-CoA

• Glucose-NADH-Acetyl-CoA-electron transport chain-carbon dioxide

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Which is a reactant of the electron transport chain?

• glucose

• carbon dioxide

• water

• oxygen

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What is the effect of temperature on the rate of

cell respiration in peas?

• When temperature increases, rate of respiration increases

• when temperature increases, cellular respiration decreases

• no chnage

• when temperature increases, rate of cellular respiration stays the same

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During the Krebs Cycle each acetyl group entering the cycle yields

• 1 ATP, 2 NADH, 3 FADH2

• 1 ATP, 3 NADH, 2 FADH

• 1 ATP, 2 NADH, 1 FADH2

• 3 ATP, 2NAD, 3ATP

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How are the electrons transferred in photosynthesis?

• The flow of electrons during the calvin cycles produces NADPH, ATP, and oxygen.

• The flow of electrons during the light reactions produces NADPH, ATP, and oxygen.

• The flow of electrons during the light reactions produces NADH, ATP, and oxygen.

• The flow of electrons during the calvin cycle produces NADH, ATP, and oxygen.

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To synthesize one glucose molecule, the calvin cycle uses ______ molecules of CO2, _____ molecules of ATP, and _____ molecules of NADPH.

• 6,18,12

• 6,12,18

• 12,6,18

• 6,6,12

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Which process is most directly driven by light energy?

• Creation of a pH gradient by pumping protons across the thylakoid membrane

• Carbon fixation in the stroma

• Reduction of NADP+ molecules

• Removal of electrons from chlorophyll molecules

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Which of the following does not occur during the Calvin cycle?

• carbon fixation

• oxidation of NADPH

• release of oxygen

• consumption of ATP

Which of the following is incorrect about C4 and CAM plants?

• In C4 plants, carbon fixation and the Calvin cycle occur in different types of cells.

• In CAM plants, carbon fixation and the Calvin cycle occur in the same cells at different times.

• In C4 and CAM plants, CO2 is incorporated into 4 carbon organic acids.

• In C4 and CAM plants, organic acids release O2 to Calvin cycle.

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