Question 1

Which of the following statements concerning the photosynthetic reaction center of Rhodopseudomonas viridis is false ?

Accepted Answer

A)  There is a pair of chlorophylls in a special environment. 
B)  Accessory pigments play a role in trapping of light. 
C)  A separation of charge represents stored energy. 
D)  The electrons being transferred can take either of two possible paths. 
A)  There is a pair of chlorophylls in a special environment. 
B)  Accessory pigments play a role in trapping of light. 
C)  A separation of charge represents stored energy. 
D)  The electrons being transferred can take either of two possible paths. D

Question 2

Of the two photosynthetic pathways, Calvin Cycle or Hatch-Slack Pathway, only the Calvin Cycle uses the pentose phosphate pathway.

Accepted Answer

A) True 
 B)False  True

Question 3

After the formation of 3-phosphoglyceric acid, the reactions in the dark phase of photosynthesis are essentially the same as those in gluconeogenesis.

Accepted Answer

A) True 
 B)False  False

Question 4

In the Calvin cycle a reshuffling of intermediates is necessary

Accepted Answer

A)  to ensure uniform incorporation of CO2 into newly synthesized sugars 
B)  to regenerate the key intermediate with which CO2 initially reacts 
C)  to use as little ATP as possible 
D)  to use as little NADPH as possible 
A)  to ensure uniform incorporation of CO2 into newly synthesized sugars 
B)  to regenerate the key intermediate with which CO2 initially reacts 
C)  to use as little ATP as possible 
D)  to use as little NADPH as possible

Question 5

Which of the following statements concerning the light reactions of photosynthesis is false ?

Accepted Answer

A)  Photophosphorylation results from the proton gradient across the thylakoid membrane. 
B)  Photosystem II is devoted to water oxidation. 
C)  P700 is Photosystem II. 
D)  Photosystem I is devoted to NADP+ reduction. 
A)  Photophosphorylation results from the proton gradient across the thylakoid membrane. 
B)  Photosystem II is devoted to water oxidation. 
C)  P700 is Photosystem II. 
D)  Photosystem I is devoted to NADP+ reduction.

Question 6

Which of the following statements concerning the light reactions of photosynthesis is false ?

Accepted Answer

A)  There are two photosystems linked by an electron transport chain 
B)  Electron transport is coupled to production of ATP 
C)  The production of NADPH is carried out by Photosystem I, whereas the splitting of water is carried out by Photosystem II 
D)  Carbon dioxide fixation takes place 
A)  There are two photosystems linked by an electron transport chain 
B)  Electron transport is coupled to production of ATP 
C)  The production of NADPH is carried out by Photosystem I, whereas the splitting of water is carried out by Photosystem II 
D)  Carbon dioxide fixation takes place

Question 7

The synthesis of ATP in chloroplasts uses a proton gradient similar to the one used in mitochondria.

Accepted Answer

A) True 
 B)False

Question 8

In plants that use the C4 pathway there is less likelihood for the occurrence of which process compared to plants that rely exclusively on the Calvin cycle?

Accepted Answer

A)  gluconeogenesis 
B)  photorespiration 
C)  the pentose phosphate pathway 
D)  lipid anabolism 
A)  gluconeogenesis 
B)  photorespiration 
C)  the pentose phosphate pathway 
D)  lipid anabolism

Question 9

​ Which of the following types of chlorophyll increases the portion of the visible spectrum that is absorbed and thus enhances the efficiency of photosynthesis in green plants compared with cyanobacteria?

Accepted Answer

A)  Chlorophyll a 
B)  Chlorophyll b 
C)  Chlorophyll c 
D)  Chlorophyll d 
A)  Chlorophyll a 
B)  Chlorophyll b 
C)  Chlorophyll c 
D)  Chlorophyll d

Question 10

Which of the following is not a component of the electron transport chain that links Photosystem I and Photosystem II?

Accepted Answer

A)  NADPH 
B)  pheophytin 
C)  plastoquinone 
D)  cytochrome f 
A)  NADPH 
B)  pheophytin 
C)  plastoquinone 
D)  cytochrome f

Question 11

Light with short wavelengths has less energy than light with long wavelengths.

Accepted Answer

A) True 
 B)False

Question 12

While actively engaging in photosynthesis under illumination,

Accepted Answer

A)  the pH of the thylakoid space would be lower than that of the stroma. 
B)  the pH of the thylakoid space would be greater than that of the stroma. 
C)  the pH of the thylakoid space and of the stroma would be about the same. 
D)  it would be impossible to predict the relative pH's of the thylakoid space and of the stroma. 
A)  the pH of the thylakoid space would be lower than that of the stroma. 
B)  the pH of the thylakoid space would be greater than that of the stroma. 
C)  the pH of the thylakoid space and of the stroma would be about the same. 
D)  it would be impossible to predict the relative pH's of the thylakoid space and of the stroma.

Question 13

The essential enzyme for the C4 pathway is

Accepted Answer

A)  ribulose bis phosphate carboxylase:oxygenase 
B)  phosphoenolpyruvate carboxylase 
C)  ferredoxin-thioredoxin reductase 
D)  glyoxylate oxygenase 
E)  none of these 
A)  ribulose bis phosphate carboxylase:oxygenase 
B)  phosphoenolpyruvate carboxylase 
C)  ferredoxin-thioredoxin reductase 
D)  glyoxylate oxygenase 
E)  none of these

Question 14

In which part of the chloroplast does production of oxygen during photosynthesis primarily occur?

Accepted Answer

A)  Grana. 
B)  Thylakoid disks. 
C)  Stroma. 
D)  Thylakoid space. 
E)  It is not known where this reaction occurs in the chloroplast. 
A)  Grana. 
B)  Thylakoid disks. 
C)  Stroma. 
D)  Thylakoid space. 
E)  It is not known where this reaction occurs in the chloroplast.

Question 15

Accessory pigments

Accepted Answer

A)  transfer electrons to reaction center chlorophylls. 
B)  transfer energy to reaction center chlorophylls. 
C)  transfer electrons from reaction center chlorophylls to phaeophytins. 
D)  transfer electrons from reaction center chlorophylls to ferredoxin. 
E)  All of these statements are true. 
A)  transfer electrons to reaction center chlorophylls. 
B)  transfer energy to reaction center chlorophylls. 
C)  transfer electrons from reaction center chlorophylls to phaeophytins. 
D)  transfer electrons from reaction center chlorophylls to ferredoxin. 
E)  All of these statements are true.

Question 16

After the reaction with Rubisco, the major difference between the Calvin Cycle and gluconeogenesis in liver is the following reaction:

Accepted Answer

A)  The reduction of 1,3 bis phosphoglyceric acid uses NADPH instead of NADH 
B)  The formation of 1,3 bis phosphoglyceric acid from 3-phosphoglyceric acid uses GTP instead of ATP. 
C)  Phosphatases are not required in plants. 
D)  The reduction of 1,3 bis phosphoglyceric acid uses NADH instead of NADPH 
E)  More than one of these reactions is substantially different in plants compared to liver. 
A)  The reduction of 1,3 bis phosphoglyceric acid uses NADPH instead of NADH 
B)  The formation of 1,3 bis phosphoglyceric acid from 3-phosphoglyceric acid uses GTP instead of ATP. 
C)  Phosphatases are not required in plants. 
D)  The reduction of 1,3 bis phosphoglyceric acid uses NADH instead of NADPH 
E)  More than one of these reactions is substantially different in plants compared to liver.

Question 17

The light reactions drive the redox process that involves the following pairs of reactants\products

Accepted Answer

A)  H2O\O2 and NADP+\NADPH 
B)  H2O\O2 and NADH\NAD+ 
C)  O2\H2O and NADPH\NADP+ 
D)  H2O\O2 and FAD\FADH2 
A)  H2O\O2 and NADP+\NADPH 
B)  H2O\O2 and NADH\NAD+ 
C)  O2\H2O and NADPH\NADP+ 
D)  H2O\O2 and FAD\FADH2

Question 18

During cyclic electron transport

Accepted Answer

A)  only Photosystem II is involved. 
B)  only Photosystem I is involved. 
C)  both photosystems are involved. 
D)  neither photosystem is involved. 
A)  only Photosystem II is involved. 
B)  only Photosystem I is involved. 
C)  both photosystems are involved. 
D)  neither photosystem is involved.

Question 19

The stoichiometric balance of the Calvin Cycle has 6 ribulose 1,5 bis phosphate and 6 CO2 forming twelve 3-phosphoglycerate. Of these 12 molecules, two are used to make glucose and the other ten are used to regenerate the ribulose 1,5 bis phosphate.

Accepted Answer

A) True 
 B)False

Question 20

The ATP synthase in photosynthesis is similar in structure and function to its mitochondrial counterpart.

Accepted Answer

A) True 
 B)False

Exam 22: Photosynthesis

Which of the following statements concerning the photosynthetic reaction center of Rhodopseudomonas viridis is false ?

Of the two photosynthetic pathways, Calvin Cycle or Hatch-Slack Pathway, only the Calvin Cycle uses the pentose phosphate pathway.

After the formation of 3-phosphoglyceric acid, the reactions in the dark phase of photosynthesis are essentially the same as those in gluconeogenesis.

In the Calvin cycle a reshuffling of intermediates is necessary

Which of the following statements concerning the light reactions of photosynthesis is false ?

Which of the following statements concerning the light reactions of photosynthesis is false ?

The synthesis of ATP in chloroplasts uses a proton gradient similar to the one used in mitochondria.

In plants that use the C4 pathway there is less likelihood for the occurrence of which process compared to plants that rely exclusively on the Calvin cycle?

​ Which of the following types of chlorophyll increases the portion of the visible spectrum that is absorbed and thus enhances the efficiency of photosynthesis in green plants compared with cyanobacteria?

Which of the following is not a component of the electron transport chain that links Photosystem I and Photosystem II?

Light with short wavelengths has less energy than light with long wavelengths.

While actively engaging in photosynthesis under illumination,

The essential enzyme for the C4 pathway is

In which part of the chloroplast does production of oxygen during photosynthesis primarily occur?

Accessory pigments

After the reaction with Rubisco, the major difference between the Calvin Cycle and gluconeogenesis in liver is the following reaction:

The light reactions drive the redox process that involves the following pairs of reactants\products

During cyclic electron transport

The stoichiometric balance of the Calvin Cycle has 6 ribulose 1,5 bis phosphate and 6 CO2 forming twelve 3-phosphoglycerate. Of these 12 molecules, two are used to make glucose and the other ten are used to regenerate the ribulose 1,5 bis phosphate.

The ATP synthase in photosynthesis is similar in structure and function to its mitochondrial counterpart.

Biochemistry and the Organization of Cells

Water the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins Enzymes

The Behavior of Proteins Enzymes Mechanisms and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids How Structure Conveys Information

Biosynthesis of Nucleic Acids Replication

Transcription of the Genetic Code the Biosynthesis of Rna

Protein Synthesis Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses Cancer and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

The Metabolism of Nitrogen

Integration of Metabolism Cellular Signaling

Filters

In plants that use the C₄ pathway there is less likelihood for the occurrence of which process compared to plants that rely exclusively on the Calvin cycle?

Which of the following types of chlorophyll increases the portion of the visible spectrum that is absorbed and thus enhances the efficiency of photosynthesis in green plants compared with cyanobacteria?

The essential enzyme for the C₄ pathway is

The stoichiometric balance of the Calvin Cycle has 6 ribulose 1,5 bis phosphate and 6 CO₂ forming twelve 3-phosphoglycerate. Of these 12 molecules, two are used to make glucose and the other ten are used to regenerate the ribulose 1,5 bis phosphate.