Cell Energy Review

What molecule carries chemical energy that cells use for their functions?

• ADP

• ATP

• NAD+

• NADP+

The water molecules labeled A in Figure 4.1 are going to the thylakoids to take part in which process?

• light-dependent reactions

• Krebs cycle

• Calvin cycle

• light-independent reactions

Which of the following is a reactant in photosynthesis?

• a. O2

• b. C6H12O6

• c. CO2

• d. COOH

Which process is best represented by the following chemical equation? sugars + oxygen → carbon dioxide + water

• a. cellular respiration

• b. photosynthesis

• c. glycolysis

• d. fermentation

The part of cellular respiration that needs oxygen takes place inside the

• a. nucleus.

• b. mitochondria.

• c. thylakoid.

• d. cytoplasm.

In which process is lactic acid formed when there is not enough oxygen present for cellular respiration to take place?

• a. ATP synthase

• b. photosystem I

• c. glycolysis

• d. fermentation

Before cellular respiration, glucose must be broken down by the process of

• a. photosynthesis.

• b. glycolysis.

• c. electron transport.

• d. fermentation.

Which of the following statements is true for all cells?

• a. They use solar energy.

• b. They use photosynthesis.

• c. They use chemical energy.

• d. They use chemosynthesis.

Energy is released from an ATP molecule for cellular processes when it

• a. has a phosphate group removed.

• b. stores an extra phosphate group.

• c. converts a phosphate group to ADP.

• d. produces a sugar molecule.

1. Which of the following statements best describes the process of photosynthesis?

• a. Plants use oxygen to make simple sugars.

• b. Chlorophyll builds sugars in the thylakoid membrane.

• c. Light breaks down water molecules and releases carbon dioxide.

• d. Chloroplasts absorb sunlight and store chemical energy.