Question 1

Which of the following statements about photosynthetic pigments is FALSE?

Accepted Answer

A) Carotenoid pigments absorb light in the 400-500 nm range 
B) Chlorophylls a and b absorb both long and short wavelength light 
C) Phycoerythrin absorbs blue and green light. 
D) Phycocyanin absorbs yellow light around the 600 nm range 
E) Bacteriochlorophyll a overlaps the absorption wavelengths of chlorophylls a and b 
A) Carotenoid pigments absorb light in the 400-500 nm range 
B) Chlorophylls a and b absorb both long and short wavelength light 
C) Phycoerythrin absorbs blue and green light. 
D) Phycocyanin absorbs yellow light around the 600 nm range 
E) Bacteriochlorophyll a overlaps the absorption wavelengths of chlorophylls a and b

Question 2

The protein which passes electrons to NADP+ thus forming the NADPH generated from noncyclic electron transport is

Accepted Answer

A) ferridoxin-NADP+ reductase. 
B) ferridoxin NADPH dehydrogenase. 
C) ferridoxin FAD dehydrogenase. 
D) FAD reductase. 
E) FAD dehydrogenase. 
A) ferridoxin-NADP+ reductase. 
B) ferridoxin NADPH dehydrogenase. 
C) ferridoxin FAD dehydrogenase. 
D) FAD reductase. 
E) FAD dehydrogenase.

Question 3

Which of the following would decrease the activity of RuBP carboxylase?
(I)a change in the pH of the stroma from 6.7 to 7.9
(II)an increase in the concentration of Mn2+ in the stroma
(III)an uncoupling protein embedded in the thylakoid membrane
(IV)presence of the transition state analog CA1P

Accepted Answer

A) I,II,III,IV 
B) I,III,IV 
C) II,III,IV 
D) III,IV 
E) I,III 
A) I,II,III,IV 
B) I,III,IV 
C) II,III,IV 
D) III,IV 
E) I,III

Question 4

It is believed that the ratio of cyclic photophosphorylation to Z-scheme photosynthesis changes in response to metabolic demands.How would this ratio in chloroplasts performing the following reaction compare to that in chloroplasts performing only the Calvin cycle?
Calvin cycle + reduction of nitrite (NO2-)to NH3

Accepted Answer

A) The ratio of cyclic photophosphotylation to Z-scheme is increased in chloroplasts performing the above reaction compared to those performing only the Calvin cycle 
B) The ratio of cyclic photophosphotylation to Z-scheme is decreased in chloroplasts performing the above reaction compared to those performing only the Calvin cycle 
C) The ratio of cyclic photophosphotylation to Z-scheme is depends primarily on the level of light available and would therefore not be altered by the above reaction 
D) The ratio of cyclic photophosphotylation to Z-scheme is depends primarily on the availability of plastocyanin and would therefore not be altered by the above reaction 
E) none of the above 
A) The ratio of cyclic photophosphotylation to Z-scheme is increased in chloroplasts performing the above reaction compared to those performing only the Calvin cycle 
B) The ratio of cyclic photophosphotylation to Z-scheme is decreased in chloroplasts performing the above reaction compared to those performing only the Calvin cycle 
C) The ratio of cyclic photophosphotylation to Z-scheme is depends primarily on the level of light available and would therefore not be altered by the above reaction 
D) The ratio of cyclic photophosphotylation to Z-scheme is depends primarily on the availability of plastocyanin and would therefore not be altered by the above reaction 
E) none of the above

Question 5

Matching
Choose the correct answer from the list below.Not all the answers will be used.

-PSII oxidizes ____.

Accepted Answer

A)  photosynthetic reaction center 
B)  tyrosyl radical 
C)  thylakoid 
D)  H2O 
E)  CF1CF0
F) Z-scheme
G)  NADPH
H) plastoquinone 
I) H+
J) RuBP carboxylase
K) CO2
L)  2 OH–
M) O2 
A)  photosynthetic reaction center 
B)  tyrosyl radical 
C)  thylakoid 
D)  H2O 
E)  CF1CF0
F) Z-scheme
G)  NADPH
H) plastoquinone 
I) H+
J) RuBP carboxylase
K) CO2
L)  2 OH–
M) O2

Question 6

Which statement about carotenoids is FALSE?

Accepted Answer

A) "$\beta$-Carotene is an example of a common accessory pigment.." 
B) "Carotenoids are often used ensure complete coverage of the spectrum." 
C) "Carotenoids are contained in the prosthetic ring structure of chlorophylls." 
D) "$\beta$-Carotene aides in light absorption for photosynthesis.." 
E) "All of the above statements are true." 
A) "$\beta$-Carotene is an example of a common accessory pigment.." 
B) "Carotenoids are often used ensure complete coverage of the spectrum." 
C) "Carotenoids are contained in the prosthetic ring structure of chlorophylls." 
D) "$\beta$-Carotene aides in light absorption for photosynthesis.." 
E) "All of the above statements are true."

Question 7

Which of the following statements concerning Z-scheme photosynthesis is TRUE?

Accepted Answer

A) Water is reduced by a Mn-containing cluster. 
B) Electrons are carried by lipid-soluble plastoquinones,which participate in a Q cycle. 
C) Ferredoxin oxidizes NADPH. 
D) Transfer occurs stepwise from PSI to PSII with increasing potential. 
E) A proton gradient is not generated to drive ATP synthesis. 
A) Water is reduced by a Mn-containing cluster. 
B) Electrons are carried by lipid-soluble plastoquinones,which participate in a Q cycle. 
C) Ferredoxin oxidizes NADPH. 
D) Transfer occurs stepwise from PSI to PSII with increasing potential. 
E) A proton gradient is not generated to drive ATP synthesis.

Question 8

Matching
Choose the correct answer from the list below.Not all the answers will be used.

-The chloroplast ATP synthase is also called ______.

Accepted Answer

A)  photosynthetic reaction center 
B)  tyrosyl radical 
C)  thylakoid 
D)  H2O 
E)  CF1CF0
F) Z-scheme
G)  NADPH
H) plastoquinone 
I) H+
J) RuBP carboxylase
K) CO2
L)  2 OH–
M) O2 
A)  photosynthetic reaction center 
B)  tyrosyl radical 
C)  thylakoid 
D)  H2O 
E)  CF1CF0
F) Z-scheme
G)  NADPH
H) plastoquinone 
I) H+
J) RuBP carboxylase
K) CO2
L)  2 OH–
M) O2

Question 9

Matching
Choose the correct answer from the list below.Not all the answers will be used.

-The most abundant biological catalyst is ______.

Accepted Answer

A)  photosynthetic reaction center 
B)  tyrosyl radical 
C)  thylakoid 
D)  H2O 
E)  CF1CF0
F) Z-scheme
G)  NADPH
H) plastoquinone 
I) H+
J) RuBP carboxylase
K) CO2
L)  2 OH–
M) O2 
A)  photosynthetic reaction center 
B)  tyrosyl radical 
C)  thylakoid 
D)  H2O 
E)  CF1CF0
F) Z-scheme
G)  NADPH
H) plastoquinone 
I) H+
J) RuBP carboxylase
K) CO2
L)  2 OH–
M) O2

Question 10

Which of the following are possible functions for the activated electrons from PSI?
(I)reduction of NAD+
(II)reduction of NADP+
(III)formation of ATP
(IV)formation of a proton gradient
(V)formation of an ionic gradient

Accepted Answer

A) I,II 
B) I,III 
C) II,III 
D) II,IV 
E) I,V 
A) I,II 
B) I,III 
C) II,III 
D) II,IV 
E) I,V

Question 11

Light dependent ATP synthesis is called

Accepted Answer

A) photophosphorylation. 
B) substrate-level phosphorylation. 
C) oxidative phosphorylation. 
D) pyrophosphorylation. 
E) none of the above 
A) photophosphorylation. 
B) substrate-level phosphorylation. 
C) oxidative phosphorylation. 
D) pyrophosphorylation. 
E) none of the above

Question 12

Which of the following statements concerning cyclic photophosphorylation is FALSE?

Accepted Answer

A) Only PSI is used. 
B) Plastocyanin is oxidized by the photosystem. 
C) NADPH donates electrons to the plastoquinone pool. 
D) Ferredoxin accepts electrons from the photosystem and reduces the cytochrome bf complex. 
E) This system is used to pump protons and form an electrochemical gradient to drive the formation of ATP. 
A) Only PSI is used. 
B) Plastocyanin is oxidized by the photosystem. 
C) NADPH donates electrons to the plastoquinone pool. 
D) Ferredoxin accepts electrons from the photosystem and reduces the cytochrome bf complex. 
E) This system is used to pump protons and form an electrochemical gradient to drive the formation of ATP.

Question 13

Electrons abstracted from water by ___ are relayed to ___ via formation of a ____.

Accepted Answer

A) OEC;P680+;plastoquinone 
B) PSII;cytochrome b6;plastoquinone 
C) OEC;P680+;tyrosyl radical 
D) OEC;cytochrome b6;tyrosyl radical 
E) OEC;P960+;tyrosyl radical 
A) OEC;P680+;plastoquinone 
B) PSII;cytochrome b6;plastoquinone 
C) OEC;P680+;tyrosyl radical 
D) OEC;cytochrome b6;tyrosyl radical 
E) OEC;P960+;tyrosyl radical

Question 14

Which of the following is a product of the Calvin cycle?
(I)ATP
(II)Glyceraldehyde-3-phosphate
(III)NADPH
(IV)CO2

Accepted Answer

A) I only 
B) I,III 
C) II only 
D) II,IV 
E) I,III,IV 
A) I only 
B) I,III 
C) II only 
D) II,IV 
E) I,III,IV

Question 15

The major sugar transported to nonphotosynthesizing cells is

Accepted Answer

A) sucrose. 
B) fructose. 
C) UDP-glucose. 
D) fructose-6-phosphate. 
E) glyceraldehyde-3-phosphate. 
A) sucrose. 
B) fructose. 
C) UDP-glucose. 
D) fructose-6-phosphate. 
E) glyceraldehyde-3-phosphate.

Question 16

In plants and cyanobacteria,PSII ______,and PSI ______.

Accepted Answer

A) oxidizes H2O,reduces NAD+ 
B) oxidizes H2O,reduces NADP+ 
C) oxidizes O2,reduces FAD 
D) oxidizes H2O,reduces FAD 
E) none of the above are true 
A) oxidizes H2O,reduces NAD+ 
B) oxidizes H2O,reduces NADP+ 
C) oxidizes O2,reduces FAD 
D) oxidizes H2O,reduces FAD 
E) none of the above are true

Question 17

Which mechanism is the method by which antenna complex chlorophylls funneled energy toward the reaction centers?

Accepted Answer

A) fluorescence 
B) internal conversion 
C) resonance energy transfer (exciton transfer) 
D) electron transfer 
E) none of the above 
A) fluorescence 
B) internal conversion 
C) resonance energy transfer (exciton transfer) 
D) electron transfer 
E) none of the above

Question 18

A houseplant is treated with a compound that inactivates plastocyanin.Which of following might allow the plant to survive?

Accepted Answer

A) supplement with light with a wavelength of 680 nm or less 
B) supplement with light with a wavelength greater than 680 nm 
C) addition of an uncoupling agent thus allowing ATP synthesis to resume 
D) addition of an oxidant capable of oxidizing NADPH,thus decreasing photorespiration. 
E) none of the above 
A) supplement with light with a wavelength of 680 nm or less 
B) supplement with light with a wavelength greater than 680 nm 
C) addition of an uncoupling agent thus allowing ATP synthesis to resume 
D) addition of an oxidant capable of oxidizing NADPH,thus decreasing photorespiration. 
E) none of the above

Question 19

Which of the following statements concerning crassulacean acid metabolism (CAM)is TRUE?

Accepted Answer

A) It allows desert plants to collect CO2 at night for use during the day in the Calvin cycle. 
B) Desert plants utilize CAM to transport CO2 to bundle sheath cells where the Calvin cycle takes place. 
C) It permanently fixes CO2 in place of RuBisCo,avoiding the oxygenase reaction. 
D) CAM facilitates transport of photorespiration products back to the Calvin cycle. 
E) All of the above are true. 
A) It allows desert plants to collect CO2 at night for use during the day in the Calvin cycle. 
B) Desert plants utilize CAM to transport CO2 to bundle sheath cells where the Calvin cycle takes place. 
C) It permanently fixes CO2 in place of RuBisCo,avoiding the oxygenase reaction. 
D) CAM facilitates transport of photorespiration products back to the Calvin cycle. 
E) All of the above are true.

Question 20

A houseplant has been mutated so that its chlorophyll is more efficient at fluorescence than normal.What will be the likely result?

Accepted Answer

A) Both forms of the light reactions will improve and the plant will better tolerate low light conditions. 
B) Z-scheme photosynthesis will be favored over cyclic photophosphorylation,making additional illumination at long wavelengths necessary. 
C) Cyclic photophosphorylation will be favored over Z-scheme,making additional illumination at short wavelengths necessary. 
D) √Both forms of the light reaction will be impaired and the plant will be less tolerant to low light conditions. 
E) none of the above 
A) Both forms of the light reactions will improve and the plant will better tolerate low light conditions. 
B) Z-scheme photosynthesis will be favored over cyclic photophosphorylation,making additional illumination at long wavelengths necessary. 
C) Cyclic photophosphorylation will be favored over Z-scheme,making additional illumination at short wavelengths necessary. 
D) √Both forms of the light reaction will be impaired and the plant will be less tolerant to low light conditions. 
E) none of the above

Exam 19: Photosynthesis

Which of the following statements about photosynthetic pigments is FALSE?

The protein which passes electrons to NADP+ thus forming the NADPH generated from noncyclic electron transport is

Which of the following would decrease the activity of RuBP carboxylase? (I)a change in the pH of the stroma from 6.7 to 7.9 (II)an increase in the concentration of Mn2+ in the stroma (III)an uncoupling protein embedded in the thylakoid membrane (IV)presence of the transition state analog CA1P

Matching Choose the correct answer from the list below.Not all the answers will be used. -PSII oxidizes ____.

Which statement about carotenoids is FALSE?

Which of the following statements concerning Z-scheme photosynthesis is TRUE?

Matching Choose the correct answer from the list below.Not all the answers will be used. -The chloroplast ATP synthase is also called ______.

Matching Choose the correct answer from the list below.Not all the answers will be used. -The most abundant biological catalyst is ______.

Which of the following are possible functions for the activated electrons from PSI? (I)reduction of NAD+ (II)reduction of NADP+ (III)formation of ATP (IV)formation of a proton gradient (V)formation of an ionic gradient

Light dependent ATP synthesis is called

Which of the following statements concerning cyclic photophosphorylation is FALSE?

Electrons abstracted from water by ___ are relayed to ___ via formation of a ____.

Which of the following is a product of the Calvin cycle? (I)ATP (II)Glyceraldehyde-3-phosphate (III)NADPH (IV)CO2

The major sugar transported to nonphotosynthesizing cells is

In plants and cyanobacteria,PSII ______,and PSI ______.

Which mechanism is the method by which antenna complex chlorophylls funneled energy toward the reaction centers?

A houseplant is treated with a compound that inactivates plastocyanin.Which of following might allow the plant to survive?

Which of the following statements concerning crassulacean acid metabolism (CAM)is TRUE?

A houseplant has been mutated so that its chlorophyll is more efficient at fluorescence than normal.What will be the likely result?

Introduction to the Chemistry of Life

Water

Nucleotides, nucleic Acids, and Genetic Information

Amino Acids

Proteins: Primary Structure

Proteins: Three-Dimensional Structure

Protein Function Part I: Myoglobin and Hemoglobin

Carbohydrates

Lipids and Biological Membranes

Membrane Transport

Enzyme Catalysis

Enzyme Kinetics, inhibition and Control

Biochemical Signaling

Introduction to Metabolism

Glucose Catabolism

Glycogen Metabolism and Gluconeogenesis

Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

Amino Acid Metabolism

Mammalian Fuel Metabolism: Integration and Regulation

Nucleotide Metabolism

Nucleic Acid Structure

DNA Replication, repair and Recombination

Transcription and Rna Processing

Protein Synthesis

Regulation of Gene Expression

Filters

The protein which passes electrons to NADP⁺ thus forming the NADPH generated from noncyclic electron transport is

Which of the following would decrease the activity of RuBP carboxylase? (I)a change in the pH of the stroma from 6.7 to 7.9 (II)an increase in the concentration of Mn²⁺ in the stroma (III)an uncoupling protein embedded in the thylakoid membrane (IV)presence of the transition state analog CA1P

Which of the following are possible functions for the activated electrons from PSI? (I)reduction of NAD⁺ (II)reduction of NADP⁺ (III)formation of ATP (IV)formation of a proton gradient (V)formation of an ionic gradient

Electrons abstracted from water by _ are relayed to _ via formation of a ____.

Which of the following is a product of the Calvin cycle? (I)ATP (II)Glyceraldehyde-3-phosphate (III)NADPH (IV)CO₂

In plants and cyanobacteria,PSII ,and PSI .