PCB 3023 UCF Exam 3
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1. Which of these processes require a membrane? Choose one or more:
A) generation of ATP by photosynthesis in plants
B) generation of ATP by photosynthesis in bacteria
C) generation of energy by mitochondria
D) generation of ATP by oxidative phosphorylation
E) generation of ATP by glycolysis: A) generation of ATP by photosynthesis in plants
B) generation of ATP by photosynthesis in bacteria
C) generation of energy by mitochondria
D) generation of ATP by oxidative phosphorylation
2. In the electron-transport chain, as electrons move along a series of carriers,
they release energy that is used to do what?Choose one:
A) phosphorylate ADP to form ATP
B) hydrolyze ATP
C) oxidize food molecules
D) split water into protons and oxygen
E) pump protons across a membrane: E) pump protons across a membrane
3. Now, where do you find an electron to give to the original low-energy electron
donor (the first one in the row)?
A. take a low energy electron from water
B. take a high energy electron from water
C. take a low energy electron from NADPH
D. take a high energy electron from NADPH
E. return the high energy electron from reduced acceptor: A. take a low energy electron
from water
4. In the light reactions of photosynthesis, a proton gradient is generated which
drives ATP synthesis. Where do protons become concentrated in the chloro-
plast?
A. stroma
B. thylakoid space
C. inner membrane
D. thylakoid membrane
E. cytosol: B. thylakoid space
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5. Which of the following statements is true?
A. The light-independent reactions of photosynthesis occur only in the absence
of light.
B. Each round of the Calvin cycle uses five molecules of
CO2 to produce one molecule of glyceraldehyde 3-phosphate and one of pyru-
vate.
C. Ribulose 1,5-bisphosphate is similar to oxaloacetate in the Citric acid cycle
in that they are both regenerated at the end of their respective cycles.: C. Ribulose
1,5-bisphosphate is similar to oxaloacetate in the Citric acid cycle in that they are both regenerated at the end of their
respective cycles.
6. Which could be the activated intermediate in the dehydration synthesis form-
ing a phosphodiester bond?
A. P,
B. AMP
C. ADP
D. ATP: D. ATP
7. Figure 14-38 illustrates the pathway of electron flow in photosynthesis. In
an alternative pathway of photosynthesis, called cyclic photophosphorylation,
electrons from photosystem I are passed to ferredoxin and are then transferred
back to plastoquinone. Which of the following would be expected to result from
cyclic photophosphorylation?
A. Electrons from cyclic photophosphorylation will be returned to the reaction
center chlorophyll molecules of photosystem II, preventing the need to split
water and reducing the production of molecular oxygen.
B. Electrons from cyclic photophosphorylation will be used to pump protons
into the thylakoid lumen, leading to production of additional ATP.
C. Electrons from cyclic photophosphorylation will be used to reduce NADP+ to
NADPH.
D. Cyclic photophosphorylation will require the splitting of additional water
molecules, resulting in the production of more molecular oxygen.: B. Electrons from
cyclic photophosphorylation will be used to pump protons into the thylakoid lumen, leading to production of additional
ATP.
, PCB 3023 UCF Exam 3
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8. What is true of the organelles that produce ATP in eukaryotic animal
cells?Choose one:
A) They evolved from bacteria engulfed by ancestral cells billions of years ago.
B) They reproduce sexually.They harbor eukaryotic-like biosynthetic machinery
for making RNA and protein.
C) They contain the same genes as the chloroplasts of plant cells.
D) They have a separate set of DNA that contains many of the same genes found
in the nucleus.: A) They evolved from bacteria engulfed by ancestral cells billions of years ago.
9. In additions to chlorophylls, chloroplasts also contain accessory pigments.
These pigments help to capture light of wavelengths not readily captured by
chlorophylls. In addition, some pigments are also anti-oxidant molecules and
protect the photosystems from oxidative damage caused by high intensity
light. Using the chlorophyll a absorbance spectrum shown in Figure 14-31,
determine which of the following pigments has an absorbance that MOST
overlaps with the absorbance of chlorophyll a?Figure 14-31 Choose one:
A. Oenin (an anthocyanin pigment): peak absorbance range ~450-550 nm
B. Phycoerythrin (a phycobilin pigment): peak absorbance range ~500-575 nm
C. β-Carotene (a carotenoid pigment): peak absorbance range ~400-500 nm
D. Betanin (a betalain pigment): peak absorbance range ~475-575 nm: C. β--
Carotene (a carotenoid pigment): peak absorbance range ~400-500 nm
10. Stage 1 of photosynthesis is, in large part, equivalent to what
process?Choose one:
A) glycolysis
B) oxidative phosphorylation
C) the carbon-fixation cycle
D) the production of acetyl CoA by the pyruvate dehydrogenase complexthe
citric acid cycle: B) oxidative phosphorylation
11. In the electron-transport chain in chloroplasts, which molecule serves as the
final electron acceptor?Choose one:
A) ADP
B) H2O
C) NAD+
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D) O2
E) NADP+: E) NADP+
12. Which of these is able to boost electrons to the very high energy level needed
to make NADPH from NADP+?Choose one:
A) photosystem I
B) ATP synthase
C) H2O
D) photosystem II
E) cytochrome b6-f complex: A) photosystem I
13. In photosynthesis, what drives the generation of ATP by ATP syn-
thase?Choose one:
A) the transfer of high-energy electrons to ATP synthase
B) a proton gradient across the thylakoid membrane
C) the phosphorylation of ATP synthase
D) the absorption of light by a photosynthetic reaction center
E) the generation of a charge separation in the photosynthetic reaction center-
: B) a proton gradient across the thylakoid membrane
14. During stage I of photosynthesis, excited electrons move in which direc-
tion?Choose one:
A) from the stroma to the thylakoid membrane to the thylakoid space
B) from the chlorophyll special pair to an electron carrier to NADP+
C) from NADPH to a mobile electron carrier to the chlorophyll special pair
D) from sunlight to the chlorophyll special pairfrom an electron carrier to
NADP+ to ATP synthase: B) from the chlorophyll special pair to an electron carrier to NADP+
15. Which photosystem is depicted in this simplified diagram?Choose one:
A) either photosystem I or II
B) More information is needed to determine which photosystem is depicted.
C) photosystem I
D) photosystem II: D) photosystem II
16. Which photosystem is depicted in this simplified diagram?Choose one:
A) either photosystem I or II
B) More information is needed to determine which photosystem is depicted.
Study online at https://quizlet.com/_fd3r3u
1. Which of these processes require a membrane? Choose one or more:
A) generation of ATP by photosynthesis in plants
B) generation of ATP by photosynthesis in bacteria
C) generation of energy by mitochondria
D) generation of ATP by oxidative phosphorylation
E) generation of ATP by glycolysis: A) generation of ATP by photosynthesis in plants
B) generation of ATP by photosynthesis in bacteria
C) generation of energy by mitochondria
D) generation of ATP by oxidative phosphorylation
2. In the electron-transport chain, as electrons move along a series of carriers,
they release energy that is used to do what?Choose one:
A) phosphorylate ADP to form ATP
B) hydrolyze ATP
C) oxidize food molecules
D) split water into protons and oxygen
E) pump protons across a membrane: E) pump protons across a membrane
3. Now, where do you find an electron to give to the original low-energy electron
donor (the first one in the row)?
A. take a low energy electron from water
B. take a high energy electron from water
C. take a low energy electron from NADPH
D. take a high energy electron from NADPH
E. return the high energy electron from reduced acceptor: A. take a low energy electron
from water
4. In the light reactions of photosynthesis, a proton gradient is generated which
drives ATP synthesis. Where do protons become concentrated in the chloro-
plast?
A. stroma
B. thylakoid space
C. inner membrane
D. thylakoid membrane
E. cytosol: B. thylakoid space
, PCB 3023 UCF Exam 3
Study online at https://quizlet.com/_fd3r3u
5. Which of the following statements is true?
A. The light-independent reactions of photosynthesis occur only in the absence
of light.
B. Each round of the Calvin cycle uses five molecules of
CO2 to produce one molecule of glyceraldehyde 3-phosphate and one of pyru-
vate.
C. Ribulose 1,5-bisphosphate is similar to oxaloacetate in the Citric acid cycle
in that they are both regenerated at the end of their respective cycles.: C. Ribulose
1,5-bisphosphate is similar to oxaloacetate in the Citric acid cycle in that they are both regenerated at the end of their
respective cycles.
6. Which could be the activated intermediate in the dehydration synthesis form-
ing a phosphodiester bond?
A. P,
B. AMP
C. ADP
D. ATP: D. ATP
7. Figure 14-38 illustrates the pathway of electron flow in photosynthesis. In
an alternative pathway of photosynthesis, called cyclic photophosphorylation,
electrons from photosystem I are passed to ferredoxin and are then transferred
back to plastoquinone. Which of the following would be expected to result from
cyclic photophosphorylation?
A. Electrons from cyclic photophosphorylation will be returned to the reaction
center chlorophyll molecules of photosystem II, preventing the need to split
water and reducing the production of molecular oxygen.
B. Electrons from cyclic photophosphorylation will be used to pump protons
into the thylakoid lumen, leading to production of additional ATP.
C. Electrons from cyclic photophosphorylation will be used to reduce NADP+ to
NADPH.
D. Cyclic photophosphorylation will require the splitting of additional water
molecules, resulting in the production of more molecular oxygen.: B. Electrons from
cyclic photophosphorylation will be used to pump protons into the thylakoid lumen, leading to production of additional
ATP.
, PCB 3023 UCF Exam 3
Study online at https://quizlet.com/_fd3r3u
8. What is true of the organelles that produce ATP in eukaryotic animal
cells?Choose one:
A) They evolved from bacteria engulfed by ancestral cells billions of years ago.
B) They reproduce sexually.They harbor eukaryotic-like biosynthetic machinery
for making RNA and protein.
C) They contain the same genes as the chloroplasts of plant cells.
D) They have a separate set of DNA that contains many of the same genes found
in the nucleus.: A) They evolved from bacteria engulfed by ancestral cells billions of years ago.
9. In additions to chlorophylls, chloroplasts also contain accessory pigments.
These pigments help to capture light of wavelengths not readily captured by
chlorophylls. In addition, some pigments are also anti-oxidant molecules and
protect the photosystems from oxidative damage caused by high intensity
light. Using the chlorophyll a absorbance spectrum shown in Figure 14-31,
determine which of the following pigments has an absorbance that MOST
overlaps with the absorbance of chlorophyll a?Figure 14-31 Choose one:
A. Oenin (an anthocyanin pigment): peak absorbance range ~450-550 nm
B. Phycoerythrin (a phycobilin pigment): peak absorbance range ~500-575 nm
C. β-Carotene (a carotenoid pigment): peak absorbance range ~400-500 nm
D. Betanin (a betalain pigment): peak absorbance range ~475-575 nm: C. β--
Carotene (a carotenoid pigment): peak absorbance range ~400-500 nm
10. Stage 1 of photosynthesis is, in large part, equivalent to what
process?Choose one:
A) glycolysis
B) oxidative phosphorylation
C) the carbon-fixation cycle
D) the production of acetyl CoA by the pyruvate dehydrogenase complexthe
citric acid cycle: B) oxidative phosphorylation
11. In the electron-transport chain in chloroplasts, which molecule serves as the
final electron acceptor?Choose one:
A) ADP
B) H2O
C) NAD+
, PCB 3023 UCF Exam 3
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D) O2
E) NADP+: E) NADP+
12. Which of these is able to boost electrons to the very high energy level needed
to make NADPH from NADP+?Choose one:
A) photosystem I
B) ATP synthase
C) H2O
D) photosystem II
E) cytochrome b6-f complex: A) photosystem I
13. In photosynthesis, what drives the generation of ATP by ATP syn-
thase?Choose one:
A) the transfer of high-energy electrons to ATP synthase
B) a proton gradient across the thylakoid membrane
C) the phosphorylation of ATP synthase
D) the absorption of light by a photosynthetic reaction center
E) the generation of a charge separation in the photosynthetic reaction center-
: B) a proton gradient across the thylakoid membrane
14. During stage I of photosynthesis, excited electrons move in which direc-
tion?Choose one:
A) from the stroma to the thylakoid membrane to the thylakoid space
B) from the chlorophyll special pair to an electron carrier to NADP+
C) from NADPH to a mobile electron carrier to the chlorophyll special pair
D) from sunlight to the chlorophyll special pairfrom an electron carrier to
NADP+ to ATP synthase: B) from the chlorophyll special pair to an electron carrier to NADP+
15. Which photosystem is depicted in this simplified diagram?Choose one:
A) either photosystem I or II
B) More information is needed to determine which photosystem is depicted.
C) photosystem I
D) photosystem II: D) photosystem II
16. Which photosystem is depicted in this simplified diagram?Choose one:
A) either photosystem I or II
B) More information is needed to determine which photosystem is depicted.
