Trees are sometimes called the “lungs” of the planet. The oxygen they release comes from

Select one:

a. Photosystem 2

b. The Krebs cycle

c. The Calvin cycle

d. Photosystem 1

e. Pyruvate oxidation

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Which of the following best describes the process of fermentation?

Select one:

a. It allows the production of ATP in oxygen-rich environments

b. It oxidizes NADH to NAD+

c. It leads to the production of lactic acid in yeast cells

d. It allows glycolysis to proceed in oxygen-poor environment by oxidizing NADH into NAD+

e. It leads to the production of ethanol in muscle cells

f. It produces 2 Lactase molecules per glucose

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Which of the following is correct about the cyclic electron flow that takes place during photosynthesis

Select one:

a. It is required because the Calvin cycle uses more ATP than NADPH

b. It happens when C3 plants get too hot

c. It happens when C3 plants have too much oxygen trapped in their cells

d. It is the most prevalent type of electron flow observed in the thylakoid membrane

e. It may happen in C3, C4, and CAM plants

f. Both A and E are correct

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