Question: If you exposed a C4 plant to 14CO2 in the light, which of the following would be the first organic molecule labeled with 14C?

Answer: Oxaloacetate.

Question: The ATP generated from cellular respiration is not sufficient to drive the Calvin cycle in plants, even if appropriate levels of NADPH and CO2 are present. Why not?

Answer: |Breaking down sugar| to provide the energy needed to synthesize sugar would be a futile cycle.

Question: Most atmospheric oxygen comes from photosynthesis. From which of the following molecules is the oxygen derived?

Answer: Water.

Question: At night, the Calvin cycle:

Answer: Can still run as long as there is ATP, CO2, and NADPH present.

Question: Carotenoids are important to many plants because these pigments are able to:

Answer: Absorb wavelengths of light that neither chlorophyll a nor b can absorb.

Question: For photosynthesis in green plants, the electron donor for the light dependent reaction is:

Answer: Water.

Question: Molecules that absorb light are called:

Answer: Pigments.

Question: What products of light reactions of photosynthesis are used in the Calvin cycle?

Answer: ATP and NADPH.

Question: In order to generate one glucose molecule, the Calvin cycle has to turn how many times?

Answer: 6.

Question: Since Rubisco can either fix carbon or oxidize RuBP, what condition will be most favorable for glucose production?

Answer: Moderate temperatures.