Question 1

The photosynthetic electron transport system includes the transmembrane complexes PSI,PSII and

Accepted Answer

A) PSIII. 
B) cytochrome a3. 
C) cytochrome b6f. 
D) cytochrome c. 
E) proton translocating ATP synthase 
A) PSIII. 
B) cytochrome a3. 
C) cytochrome b6f. 
D) cytochrome c. 
E) proton translocating ATP synthase C

Question 2

Which of the following is TRUE regarding the difference between chlorophyll structures and heme?

Accepted Answer

A) Chlorophyll structures contain copper rather than iron. 
B) Chlorophyll structures typically have five rings while heme typically has four. 
C) Chlorophyll often has fewer R groups attached to the ring system that heme. 
D) Chlorophyll metal atoms coordinate to the nitrogen atoms from the ring where as heme iron atoms coordinate to carbon atoms. 
E) all of the above 
A) Chlorophyll structures contain copper rather than iron. 
B) Chlorophyll structures typically have five rings while heme typically has four. 
C) Chlorophyll often has fewer R groups attached to the ring system that heme. 
D) Chlorophyll metal atoms coordinate to the nitrogen atoms from the ring where as heme iron atoms coordinate to carbon atoms. 
E) all of the above B

Question 3

Which of the following statements about the OEC is FALSE?
(I)It is located at the lumenal surface of the D1 subunit
(II)It has a low reduction potential in all states
(III)It contains Mn4CaO4 or Mn4CaO5
(IV)Part of the cluster is liganded to the amino acids Asp and Glu

Accepted Answer

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

Question 4

Synthesis of starch requires
(I)ATP
(II)glucose-1-phosphate
(III)ADP-glucose phosphatase
(IV)ADP-glucose

Accepted Answer

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

Question 5

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

-The light reactions of photosynthesis occur in the _____ membrane of the chloroplast.

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

Light activation of P680 results in which of the following?
(I)electron transfer as follows: QA $\to$ QB $\to$ Chlα $\to$ Pheoα
(II)electron transfer from PSI directly back to the Pheoα-QA complex
(III)reduction of S4 of the OEC to S1 of the OEC
(IV)reduction of cytochrome b6f

Accepted Answer

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

Question 7

Based on comparison of oxidative phosphorylation to photophosphoylation,which of the following is TRUE?

Accepted Answer

A) Photophosphoylation cannot be uncoupled by an ionophore like can be done with oxidative phosphorylation. 
B) The formation of a proton gradient is required for adequate function of both photo- and oxidative phosphorylation. 
C) Although sequence similarities exist between the ATP synthases from each process,little structural similarity is observed. 
D) Photophosphorylation is not dependent on spontaneous electron flow whereas oxidative phosphorylation requires that electron flow be spontaneous. 
E) None of the above is true. 
A) Photophosphoylation cannot be uncoupled by an ionophore like can be done with oxidative phosphorylation. 
B) The formation of a proton gradient is required for adequate function of both photo- and oxidative phosphorylation. 
C) Although sequence similarities exist between the ATP synthases from each process,little structural similarity is observed. 
D) Photophosphorylation is not dependent on spontaneous electron flow whereas oxidative phosphorylation requires that electron flow be spontaneous. 
E) None of the above is true.

Question 8

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

-In the Calvin cycle,______ is "fixed" to generate carbohydrate molecules.

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

Binding of oxygen to RuBisCo

Accepted Answer

A) destroys enzymatic function because oxygen is a suicide inhibitor of the enzyme. 
B) targets the enzyme for proteolytic degradation. 
C) decreases the enzyme's Km for oxygen since binding is cooperative. 
D) activates the enzyme for carbon fixing reactions. 
E) costs the cell ATP since energy is required to replace intermediates necessary for carbon fixation. 
A) destroys enzymatic function because oxygen is a suicide inhibitor of the enzyme. 
B) targets the enzyme for proteolytic degradation. 
C) decreases the enzyme's Km for oxygen since binding is cooperative. 
D) activates the enzyme for carbon fixing reactions. 
E) costs the cell ATP since energy is required to replace intermediates necessary for carbon fixation.

Question 10

An assembly of antenna pigments,or light harvesting complex,

Accepted Answer

A) are often cytosolic proteins containing multiple chlorophylls. 
B) are nearly identical in structure from species to species. 
C) are likely optimized to allow efficient transfer of energy throughout pigments. 
D) contain an alternating structure of lipid molecules and chlorophylls allowing maximal incorporation in the membrane. 
E) none of the above 
A) are often cytosolic proteins containing multiple chlorophylls. 
B) are nearly identical in structure from species to species. 
C) are likely optimized to allow efficient transfer of energy throughout pigments. 
D) contain an alternating structure of lipid molecules and chlorophylls allowing maximal incorporation in the membrane. 
E) none of the above

Question 11

Which of the following correctly identifies the products and amounts produced from noncyclic electron transport?

Accepted Answer

A) 4 ATP per O2 plus 2 NADPH per 4 electrons liberated from 2 H2O 
B) 5 ATP per O2 plus 1 NADPH per 4 electrons liberated from 2 H2O 
C) 2)5 ATP per O2 plus 2 NADPH per 2 electrons liberated from 2 H2O 
D) 9 ATP per O2 plus 2 NADPH per 4 electrons liberated from 2 H2O 
E) 5 ATP equivalents 
A) 4 ATP per O2 plus 2 NADPH per 4 electrons liberated from 2 H2O 
B) 5 ATP per O2 plus 1 NADPH per 4 electrons liberated from 2 H2O 
C) 2)5 ATP per O2 plus 2 NADPH per 2 electrons liberated from 2 H2O 
D) 9 ATP per O2 plus 2 NADPH per 4 electrons liberated from 2 H2O 
E) 5 ATP equivalents

Question 12

The groups that initially absorb light in the Rps.viridis photosynthetic reaction center are observed to be arranged with ______,and are called the ______.

Accepted Answer

A) twofold symmetry,special pair 
B) anti-parallel symmetry,RHC 
C) trifold symmetry,tri-harvest center 
D) shared menaquinone prosthetic groups,shared pair 
E) none of the above 
A) twofold symmetry,special pair 
B) anti-parallel symmetry,RHC 
C) trifold symmetry,tri-harvest center 
D) shared menaquinone prosthetic groups,shared pair 
E) none of the above

Question 13

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

-The electron pathway from water to NADP+,referred to as the ____,allows two loci for photochemical events.

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 14

Which of the following is TRUE regarding the oxygen evolving complex (OEC)?
(I)All states have high reduction potentials that exceed that of water.
(II)The OEC is made up of magnesium atoms that bridge oxygen atoms together.
(III)Current evidence indicates that the OEC cycles between five states in which the metal atoms exist in a variety of combinations of oxidation states.
(IV)During the course of reaction,protons and electrons are abstracted from one water molecule yielding one O2.

Accepted Answer

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

Question 15

Synthesis of sucrose requires which of the following?
(I)glyceraldehyde-3-phosphate and/or dihydroxyacetone phosphate
(II)sucrose phosphate kinase
(III)sucrose phosphate phosphatase
(IV)UTP

Accepted Answer

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

Question 16

Which of the following is the site of ATP synthesis in chloroplasts?

Accepted Answer

A) smooth outer membrane 
B) inner membrane space 
C) stroma 
D) thylakoid membrane 
E) thylakoid compartment 
A) smooth outer membrane 
B) inner membrane space 
C) stroma 
D) thylakoid membrane 
E) thylakoid compartment

Question 17

Which of the following correctly represents the Q cycle? (Note: Portions are omitted for simplicity)

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 18

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

-Light-harvesting antennas gather photons and pass the energy to the ______ .

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 19

Which of the following is(are)FALSE about photorespiration?

Accepted Answer

A) RuBP carboxylase oxygenates ribulose bisphosphate to form 2-phosphoglycolate and 3-phosphoglycerate. 
B) The reaction provides an additional mechanism to generate ATP and NADPH. 
C) The C4 cycle minimizes the need for photorespiration. 
D) CO2 and O2 compete for binding the RuBP carboxylase active site. 
E) Photorespiration is thought to function as a protective mechanism to allow dissipation of unused energy. 
A) RuBP carboxylase oxygenates ribulose bisphosphate to form 2-phosphoglycolate and 3-phosphoglycerate. 
B) The reaction provides an additional mechanism to generate ATP and NADPH. 
C) The C4 cycle minimizes the need for photorespiration. 
D) CO2 and O2 compete for binding the RuBP carboxylase active site. 
E) Photorespiration is thought to function as a protective mechanism to allow dissipation of unused energy.

Question 20

A radioactive labeled carbon entering the Calvin cycle as 14CO2

Accepted Answer

A) would be removed from the cycle as various carbohydrate side products in the first round of the cycle. 
B) could be identified only in the triose intermediates within the cycle. 
C) would only be observed in intermediates following three rounds of the cycle. 
D) could be observed in any of the intermediates within the cycle during the first or subsequent rounds of the cycle. 
E) would be rapidly removed by transketolase catalyzed reactions. 
A) would be removed from the cycle as various carbohydrate side products in the first round of the cycle. 
B) could be identified only in the triose intermediates within the cycle. 
C) would only be observed in intermediates following three rounds of the cycle. 
D) could be observed in any of the intermediates within the cycle during the first or subsequent rounds of the cycle. 
E) would be rapidly removed by transketolase catalyzed reactions.

Exam 19: Photosynthesis

The photosynthetic electron transport system includes the transmembrane complexes PSI,PSII and

Which of the following is TRUE regarding the difference between chlorophyll structures and heme?

Which of the following statements about the OEC is FALSE? (I)It is located at the lumenal surface of the D1 subunit (II)It has a low reduction potential in all states (III)It contains Mn4CaO4 or Mn4CaO5 (IV)Part of the cluster is liganded to the amino acids Asp and Glu

Synthesis of starch requires (I)ATP (II)glucose-1-phosphate (III)ADP-glucose phosphatase (IV)ADP-glucose

Matching Choose the correct answer from the list below.Not all the answers will be used. -The light reactions of photosynthesis occur in the _____ membrane of the chloroplast.

Light activation of P680 results in which of the following? (I)electron transfer as follows: QA →\to→ QB →\to→ Chlα →\to→ Pheoα (II)electron transfer from PSI directly back to the Pheoα-QA complex (III)reduction of S4 of the OEC to S1 of the OEC (IV)reduction of cytochrome b6f

Based on comparison of oxidative phosphorylation to photophosphoylation,which of the following is TRUE?

Matching Choose the correct answer from the list below.Not all the answers will be used. -In the Calvin cycle,______ is "fixed" to generate carbohydrate molecules.

Binding of oxygen to RuBisCo

An assembly of antenna pigments,or light harvesting complex,

Which of the following correctly identifies the products and amounts produced from noncyclic electron transport?

The groups that initially absorb light in the Rps.viridis photosynthetic reaction center are observed to be arranged with ______,and are called the ______.

Matching Choose the correct answer from the list below.Not all the answers will be used. -The electron pathway from water to NADP+,referred to as the ____,allows two loci for photochemical events.

Synthesis of sucrose requires which of the following? (I)glyceraldehyde-3-phosphate and/or dihydroxyacetone phosphate (II)sucrose phosphate kinase (III)sucrose phosphate phosphatase (IV)UTP

Which of the following is the site of ATP synthesis in chloroplasts?

Which of the following correctly represents the Q cycle? (Note: Portions are omitted for simplicity)

Matching Choose the correct answer from the list below.Not all the answers will be used. -Light-harvesting antennas gather photons and pass the energy to the ______ .

Which of the following is(are)FALSE about photorespiration?

A radioactive labeled carbon entering the Calvin cycle as 14CO2

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

Which of the following statements about the OEC is FALSE? (I)It is located at the lumenal surface of the D1 subunit (II)It has a low reduction potential in all states (III)It contains Mn₄CaO₄ or Mn₄CaO₅ (IV)Part of the cluster is liganded to the amino acids Asp and Glu

Light activation of P680 results in which of the following? (I)electron transfer as follows: Q_A $\to$ Q_B $\to$ Chlα $\to$ Pheoα (II)electron transfer from PSI directly back to the Pheoα-Q_A complex (III)reduction of S₄ of the OEC to S₁ of the OEC (IV)reduction of cytochrome b₆f

The groups that initially absorb light in the Rps.viridis photosynthetic reaction center are observed to be arranged with ,and are called the .

Matching Choose the correct answer from the list below.Not all the answers will be used. -The electron pathway from water to NADP⁺,referred to as the ____,allows two loci for photochemical events.

A radioactive labeled carbon entering the Calvin cycle as ¹⁴CO₂