Chapter 8

In mechanism, photophosphorylation is most similar to __________.

oxidative phosphorylation in cellular respiration

Which of the following molecules is the primary product of photosystem I?

NADPH

In the Calvin cycle, how many ATP molecules are required to regenerate RuBP from five G3P molecules?

3

How many carbon dioxide molecules must be added to RuBP to make a single molecule of glucose?

6

The light reactions of photosynthesis supply the Calvin cycle with __________.

ATP and NADPH

Which of the following statements is a correct distinction between autotrophs and heterotrophs?

Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic.

Which of the following sequences correctly represents the flow of electrons during photosynthesis?

H2O → NADPH → Calvin cycle

How is photosynthesis similar in C4 plants and CAM plants?

In both cases, rubisco is not used to fix carbon initially.

Which of the following products of the light reactions of photosynthesis is used during the Calvin cycle?

NADPH

After 3-PGA is phosphorylated, it is reduced by _____.

NADPH

Carbon fixation involves the addition of carbon dioxide to _____.

RuBP

Which molecule is regenerated in the regeneration phase of the Calvin cycle? Without regeneration of this molecule, the Calvin cycle would stop.

RuBP

Which set of reactions uses H2O and produces O2?

The light-dependent reactions

Which of the following statements best describes the relationship between the light-dependent and light-independent reactions of photosynthesis?

The light-dependent reactions produce ATP and NADPH, which are then used by the light-independent reactions.

What is the importance of the light-independent reactions in terms of carbon flow in the biosphere?

The light-independent reactions turn CO2, a gas, into usable carbon in the form of sugars.

What is the biological significance of the light-independent reactions of photosynthesis?

They convert carbon dioxide to sugar.

True or false? The light-dependent reactions of photosynthesis use water and produce oxygen.

True

In C4 and CAM plants carbon dioxide is fixed in the _____ of mesophyll cells.

cytoplasm

The overall function of the Calvin cycle is __________.

making sugar

Which of the following is(are) a product(s) of the light reactions of photosynthesis?

oxygen, ATP, and NADPH

In C3 plants the conservation of water promotes _____.

photorespiration

Which process produces oxygen?

photosynthesis

Which process is most directly driven by light energy?

removal of electrons from chlorophyll molecules

_____ has a longer wavelength than _____.

red and green

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

release of oxygen

C4 plants occur more commonly in desert conditions because __________.

they can fix carbon at the lower CO2 concentrations that develop when the stomata are closed

C4 plants differ from C3 and CAM plants in that C4 plants _____.

transfer fixed carbon dioxide to cells in which the Calvin cycle occurs