All of the listed processes can use G3P.
G3P is used in which of the following processes?
Stroma
Where does the Calvin cycle of photosynthesis occur?
The light reactions by linear electron flow
During which process is molecular oxygen produced in photosynthesis?
Stomata
Carbon dioxide and oxygen enter and exit a leaf by diffusion. Which structure(s) on a leaf allow(s) this process to happen?
thylakoids
The light reactions of photosynthesis occur in the __________.
Water is oxidized and carbon dioxide is reduced.
Metabolic pathways are typically redox processes. In photosynthesis, what molecule is oxidized and what molecule is reduced?
ATP and NADPH produced in the light reactions provide the energy for the production of sugars in the Calvin cycle.
The Calvin cycle could not occur without the light reactions. Which of the following statements describes why this is the case?
The first product of carbon fixation in C4 plants is a four-carbon compound instead of a three-carbon compound.
Which of the following statements correctly describes the difference in carbon fixation between C3 and C4 plants?
Thylakoid membrane
The light reactions of photosynthesis use chemiosmosis to produce ATP that will be used in the Calvin cycle. The electrochemical gradient that drives this chemiosmosis is formed across which structure(s)?
Oxidative phosphorylation in cellular respiration
In the light reactions of photosynthesis, ATP is produced by photophosphorylation. Which of the listed processes is most similar to photophosphorylation?
Chlorophyll absorbs all of the visible spectrum of light except green, which it reflects.
What property of the pigment chlorophyll makes it appear green?
The Calvin cycle incorporates each CO2 molecule, one at a time, by attaching it to a five-carbon sugar named ribulose bisphosphate.
During the Calvin cycle, what happens during the carbon fixation phase?
water
The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. The oxygen comes from __________.
CO2 is reduced.
Of the following, which occurs during the Calvin cycle?
The Calvin cycle requires products only produced when the photosystems are illuminated.
The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night. Why?
use chemiosmosis to produce ATP
Both mitochondria and chloroplasts __________.
ATP and NADPH.
The light reactions of photosynthesis supply the Calvin cycle with __________.
While it did have access to light, the plant stored energy in the form of sugars or starch, and it was able to derive energy from the stored molecules during your vacation.
You have a large, healthy philodendron that you carelessly leave in total darkness while you are away on vacation. You are surprised to find that it is still alive when you return. What has the plant been using for an energy source while in the dark?
capture light energy
The most important role of pigments in photosynthesis is to __________.
Water
Where do the electrons entering photosystem II come from?
G3P production
Which of the following processes occurs during the second phase, the reduction phase, of the Calvin cycle?
They are the ultimate sources of organic compounds for all nonautotrophic organisms.
Why are most autotrophs referred to as the producers of the biosphere?
Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic.
Which of the following statements is a correct distinction between autotrophs and heterotrophs?
NADPH; ATP; oxygen
The light reactions of photosynthesis generate high-energy electrons, which end up in __________. The light reactions also produce __________ and __________.
carbon dioxide
In photosynthesis, plants use carbon from __________ to make sugar and other organic molecules.
Through the stomata
How does carbon dioxide enter the leaf?
Thylakoid membranes
Chlorophyll molecules are in which part of the chloroplast?
movement of H+ through a membrane
The energy used to produce ATP in the light reactions of photosynthesis comes from __________.
their electrons become excited
When chloroplast pigments absorb light, __________.
