Question 1

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

Accepted Answer

A)  NADPH → O2 → CO2
B)  H2O → NADPH → Calvin cycle
C)  H2O → photosystem I → photosystem II
D)  NADPH → electron transport chain → O2 B

Question 2

Figure 8.2
-Use Figure 8.2 and the compounds labeled A,B,C,D,and E to answer the following question.If ATP used by this plant is labeled with radioactive phosphorus,which molecule or molecules of the Calvin cycle will be radioactively labeled first?

Accepted Answer

A)  B only
B)  B and C only
C)  B,C,and D only
D)  B and E only
E)  B and D only D

Question 3

In most plants the carbohydrates produced by photosynthesis are transported out of the leaves to the rest of the plant as which of the following molecules?

Accepted Answer

A)  glyceraldehyde 3-phosphate (G3P) 
B)  glucose
C)  sucrose
D)  starch C

Question 4

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

Accepted Answer

A)  carbon fixation
B)  oxidation of NADPH
C)  release of oxygen
D)  regeneration of the CO2 acceptor

Question 5

Which of the following statements about the relationship between photosynthesis and cellular respiration is correct?

Accepted Answer

A)  In cellular respiration,the biochemical pathways of photosynthesis run in reverse.
B)  In photosynthesis,the biochemical pathways of cellular respiration run in reverse.
C)  Cellular respiration occurs only in animals,and photosynthesis occurs only in plants.
D)  There is a net consumption of ATP in cellular respiration and a net production of ATP in photosynthesis.
E)  Cellular respiration is catabolic and photosynthesis is anabolic.

Question 6

Generation of proton gradients across membranes occurs during which of the following reactions?

Accepted Answer

A)  photosynthesis only
B)  cellular respiration only
C)  both photosynthesis and cellular respiration
D)  photosynthesis,cellular respiration,and alcohol fermentation in yeast

Question 7

What compound provides the reducing power for the Calvin cycle reactions?

Accepted Answer

A)  ATP
B)  FAD
C)  FADH2
D)  NADPH
E)  CO2

Question 8

In autotrophic bacteria,where are chlorophyll-like pigments located?

Accepted Answer

A)  in the chloroplast membranes
B)  in the central vacuole membrane
C)  in infolded regions of the plasma membrane
D)  in infolded regions of the cell wall

Question 9

What is the relationship between wavelength of light and the quantity of energy per photon?

Accepted Answer

A)  They have a direct,linear relationship.
B)  They are inversely related.
C)  They are logarithmically related.
D)  They are only related in certain parts of the spectrum.

Question 10

A flask containing photosynthetic green algae and a control flask containing water with no algae are both placed under a bank of lights,which are set to cycle between 12 hours of light and 12 hours of dark.The dissolved oxygen concentrations in both flasks are monitored.Predict what the relative dissolved oxygen concentrations will be in the flask with algae compared to the control flask.

Accepted Answer

A)  The concentration of dissolved oxygen in the flask with algae will always be higher.
B)  The concentration of dissolved oxygen in the flask with algae will always be lower.
C)  The concentration of dissolved oxygen in the flask with algae will be higher in the light but the same in the dark.
D)  The concentration of dissolved oxygen in the flask with algae will be higher in the light but lower in the dark.
E)  The concentration of dissolved oxygen in the flask with algae will be lower in the light but higher in the dark.

Question 11

Some photosynthetic organisms contain chloroplasts that lack photosystem II,yet they are able to survive.Which of the following experimental approaches would be a reasonable way to detect the lack of photosystem II in these organisms?

Accepted Answer

A)  Determine if they have thylakoid membranes in the chloroplasts.
B)  Test whether they release O2 in the light.
C)  Test whether they fix CO2 in the dark.
D)  Test the action spectrum for photosynthesis.

Question 12

How would you predict that doubling the atmospheric CO2 concentration would affect C3 plants?

Accepted Answer

A)  They will experience increased rates of photosynthesis and growth.
B)  They will experience increased rates of photorespiration and decreased growth rates.
C)  They will experience decreased rates of photosynthesis and growth.
D)  They will experience increased rates of photosynthesis,increased water loss through stomata,and decreased growth rates.

Question 13

If plants are grown with H2O containing a radioactive isotope of oxygen (18O),subsequent analysis will show that 18O first appears in which of the following molecules produced by the plants?

Accepted Answer

A)  O2
B)  glyceraldehyde 3-phosphate (G3P) 
C)  CO2
D)  ribulose bisphosphate (RuBP)

Question 14

When plants produce excess carbohydrates,the extra sugar is generally stored in which of the following forms?

Accepted Answer

A)  glyceraldehyde 3-phosphate (G3P) 
B)  glucose
C)  cellulose
D)  starch

Question 15

The NADPH required for the Calvin cycle is produced by which of the following metabolic reactions?

Accepted Answer

A)  reactions initiated in photosystem I
B)  reactions initiated in photosystem II
C)  the citric acid cycle
D)  glycolysis
E)  oxidative phosphorylation

Question 16

An early step in the process of carbon fixation combines three molecules of CO2 with three molecules of RuBP to produce three 6-carbon molecules,which are immediately converted to six 3-carbon molecules.These six molecules are phosphorylated and reduced to produce glyceraldehyde 3-phosphate (G3P).What additional events occur to complete the Calvin cycle?

Accepted Answer

A)  release of two G3P to make sugars and regeneration of ATP from ADP
B)  release of one G3P to make sugars and regeneration of RuBP
C)  release of one G3P to make sugars and regeneration of NADPH from NADP+
D)  release of one G3P to make sugars and regeneration of citrate

Question 17

Which of the following reactions produces the oxygen released by photosynthesis?

Accepted Answer

A)  reduction of NADP+
B)  splitting of water molecules
C)  chemiosmosis
D)  electron transfer in photosystem I.

Question 18

Theodor W.Engelmann illuminated a filament of algae with light that passed through a prism,thus exposing different segments of algae to different wavelengths of light.He added aerobic bacteria and then noted in which areas the bacteria congregated.He found that the largest groups were found in the areas illuminated by the red and blue light.What would you predict would happen if you ran the same experiment without passing light through a prism?

Accepted Answer

A)  The bacteria would congregate toward the middle of the algal filament.
B)  The bacteria would be relatively evenly distributed along the algal filament.
C)  The number of bacteria present would decrease due to an increase in the carbon dioxide concentration.
D)  The bacteria would congregate toward the two ends of the algal filament.
E)  The number of bacteria would decrease due to a lack of oxygen.

Question 19

Imagine that a researcher has developed a way to isolate thylakoids from chloroplasts and to make the pH of the thylakoid space acidic.If these isolated thylakoids are transferred to a pH8 solution in the dark,what might the researcher expect to observe?

Accepted Answer

A)  that the isolated thylakoids produce ATP
B)  that the isolated thylakoids produce glucose
C)  that the isolated thylakoids reduce NADP+ to NADPH
D)  that the isolated thylakoids produce oxygen gas

Question 20

Figure 8.2
-Use Figure 8.2 and the compounds labeled A,B,C,D,and E to answer the following question.Which molecule in the Calvin cycle also serves as the substrate for the first step in the energy payoff phase of glycolysis?

Accepted Answer

A)  3-phosphoglycerate
B)  B
C)  C
D)  E only

Exam 8: Photosynthesis

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

Figure 8.2 -Use Figure 8.2 and the compounds labeled A,B,C,D,and E to answer the following question.If ATP used by this plant is labeled with radioactive phosphorus,which molecule or molecules of the Calvin cycle will be radioactively labeled first?

In most plants the carbohydrates produced by photosynthesis are transported out of the leaves to the rest of the plant as which of the following molecules?

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

Which of the following statements about the relationship between photosynthesis and cellular respiration is correct?

Generation of proton gradients across membranes occurs during which of the following reactions?

What compound provides the reducing power for the Calvin cycle reactions?

In autotrophic bacteria,where are chlorophyll-like pigments located?

What is the relationship between wavelength of light and the quantity of energy per photon?

Some photosynthetic organisms contain chloroplasts that lack photosystem II,yet they are able to survive.Which of the following experimental approaches would be a reasonable way to detect the lack of photosystem II in these organisms?

How would you predict that doubling the atmospheric CO₂ concentration would affect C₃ plants?

If plants are grown with H₂O containing a radioactive isotope of oxygen (¹⁸O) ,subsequent analysis will show that ¹⁸O first appears in which of the following molecules produced by the plants?

When plants produce excess carbohydrates,the extra sugar is generally stored in which of the following forms?

The NADPH required for the Calvin cycle is produced by which of the following metabolic reactions?

Which of the following reactions produces the oxygen released by photosynthesis?

Imagine that a researcher has developed a way to isolate thylakoids from chloroplasts and to make the pH of the thylakoid space acidic.If these isolated thylakoids are transferred to a pH8 solution in the dark,what might the researcher expect to observe?

Figure 8.2 -Use Figure 8.2 and the compounds labeled A,B,C,D,and E to answer the following question.Which molecule in the Calvin cycle also serves as the substrate for the first step in the energy payoff phase of glycolysis?

Exam 8: Photosynthesis

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

Figure 8.2 -Use Figure 8.2 and the compounds labeled A,B,C,D,and E to answer the following question.If ATP used by this plant is labeled with radioactive phosphorus,which molecule or molecules of the Calvin cycle will be radioactively labeled first?

In most plants the carbohydrates produced by photosynthesis are transported out of the leaves to the rest of the plant as which of the following molecules?

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

Which of the following statements about the relationship between photosynthesis and cellular respiration is correct?

Generation of proton gradients across membranes occurs during which of the following reactions?

What compound provides the reducing power for the Calvin cycle reactions?

In autotrophic bacteria,where are chlorophyll-like pigments located?

What is the relationship between wavelength of light and the quantity of energy per photon?

Some photosynthetic organisms contain chloroplasts that lack photosystem II,yet they are able to survive.Which of the following experimental approaches would be a reasonable way to detect the lack of photosystem II in these organisms?

How would you predict that doubling the atmospheric CO2 concentration would affect C3 plants?

If plants are grown with H2O containing a radioactive isotope of oxygen (18O) ,subsequent analysis will show that 18O first appears in which of the following molecules produced by the plants?

When plants produce excess carbohydrates,the extra sugar is generally stored in which of the following forms?

The NADPH required for the Calvin cycle is produced by which of the following metabolic reactions?

Which of the following reactions produces the oxygen released by photosynthesis?

Imagine that a researcher has developed a way to isolate thylakoids from chloroplasts and to make the pH of the thylakoid space acidic.If these isolated thylakoids are transferred to a pH8 solution in the dark,what might the researcher expect to observe?

Figure 8.2 -Use Figure 8.2 and the compounds labeled A,B,C,D,and E to answer the following question.Which molecule in the Calvin cycle also serves as the substrate for the first step in the energy payoff phase of glycolysis?

How would you predict that doubling the atmospheric CO₂ concentration would affect C₃ plants?

If plants are grown with H₂O containing a radioactive isotope of oxygen (¹⁸O) ,subsequent analysis will show that ¹⁸O first appears in which of the following molecules produced by the plants?