Question 1

The nuclear gene for Rubisco codes for the catalytic subunit, while the regulatory gene is found in the chloroplast.

Accepted Answer

A) True 
 B)False

Question 2

In order to regenerate ribulose 1,5 bisphosphate, the following reaction is required:

Accepted Answer

A)  A phosphate group must be added to ribulose-1-phosphate. 
B)  The enzyme involved is phosphoribulose kinase. 
C)  ATP is used as a source of phosphate. 
D)  Both phosphoribulose kinase and ATP are needed. 
E)  All of these statements are true. 
A)  A phosphate group must be added to ribulose-1-phosphate. 
B)  The enzyme involved is phosphoribulose kinase. 
C)  ATP is used as a source of phosphate. 
D)  Both phosphoribulose kinase and ATP are needed. 
E)  All of these statements are true.

Question 3

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 4

After the CO2 fixation step in photosynthesis, the production of sugars takes place

Accepted Answer

A)  as a reversal of glycolysis. 
B)  as a reversal of the citric acid cycle. 
C)  in the same manner as gluconeogenesis. 
D)  as a reversal of the pentose phosphate pathway. 
E)  the same as in glycolysis 
A)  as a reversal of glycolysis. 
B)  as a reversal of the citric acid cycle. 
C)  in the same manner as gluconeogenesis. 
D)  as a reversal of the pentose phosphate pathway. 
E)  the same as in glycolysis

Question 5

The stoichiometric balance of the Calvin Cycle has 6 ribulose 1,5 bisphosphate 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 bisphosphate.

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

The earliest photosynthetic organisms most likely used water as an electron source.

Accepted Answer

A) True 
 B)False

Question 8

The Hatch-Slack Pathway is important in tropical zones since, in order to conserve water, the pores of tropical leaves are very small.

Accepted Answer

A) True 
 B)False

Question 9

In chloroplasts,

Accepted Answer

A)  the light reactions take place in the thylakoid disks, whereas the dark reactions occur in the stroma 
B)  the dark reactions take place in the thylakoid disks, whereas the light reactions occur in the stroma 
C)  the light reactions take place in the thylakoid space, whereas the dark reactions occur in the stroma 
D)  the dark reactions take place in the thylakoid space, whereas the light reactions occur in the stroma 
E)  none of these 
A)  the light reactions take place in the thylakoid disks, whereas the dark reactions occur in the stroma 
B)  the dark reactions take place in the thylakoid disks, whereas the light reactions occur in the stroma 
C)  the light reactions take place in the thylakoid space, whereas the dark reactions occur in the stroma 
D)  the dark reactions take place in the thylakoid space, whereas the light reactions occur in the stroma 
E)  none of these

Question 10

The first CO2 fixing reaction of the Hatch-Slack pathway is:

Accepted Answer

A)  Conversion of phosphoenolpyruvate and CO2 to oxaloacetate. 
B)  Conversion of succinate and CO2 to α-ketoglutarate. 
C)  Conversion of acetate and CO2 to pyruvate. 
D)  Conversion of acetate and CO2 to malonate. 
E)  More than one of these reactions can initiate the Hatch-Slack Pathway. 
A)  Conversion of phosphoenolpyruvate and CO2 to oxaloacetate. 
B)  Conversion of succinate and CO2 to α-ketoglutarate. 
C)  Conversion of acetate and CO2 to pyruvate. 
D)  Conversion of acetate and CO2 to malonate. 
E)  More than one of these reactions can initiate the Hatch-Slack Pathway.

Question 11

Bacterial products of photosynthesis, other than oxygen and sugars, can include all of these, except:

Accepted Answer

A)  H2S 
B)  NH3 
C)  CH4 
D)  Water 
E)  All of these are products of photosynthetic bacteria. 
A)  H2S 
B)  NH3 
C)  CH4 
D)  Water 
E)  All of these are products of photosynthetic bacteria.

Question 12

The production of ATP in photosynthesis

Accepted Answer

A)  is not linked to a proton gradient across a membrane 
B)  does not involve membrane-bound proteins 
C)  does not require the presence of light 
D)  provides the energy for production of sugars 
E)  occurs only in the dark 
A)  is not linked to a proton gradient across a membrane 
B)  does not involve membrane-bound proteins 
C)  does not require the presence of light 
D)  provides the energy for production of sugars 
E)  occurs only in the dark

Question 13

The transfer of electrons from water to NADP+ to produce oxygen and NADPH is a highly exergonic process.

Accepted Answer

A) True 
 B)False

Question 14

The process of ATP synthesis in chloroplasts is referred to as

Accepted Answer

A)  oxidative phosphorylation. 
B)  photophosphorylation 
C)  reductive phosphorylation 
D)  substrate-level phosphorylation. 
E)  none of these 
A)  oxidative phosphorylation. 
B)  photophosphorylation 
C)  reductive phosphorylation 
D)  substrate-level phosphorylation. 
E)  none of these

Question 15

It is believed that the ratio of cyclic electron transport to Z-scheme photosynthesis changes in response to metabolic demands. If a plant were actively engaged in a large amount of reductive biosynthesis, requiring NADPH, how would it alter these processes compared to a plant just performing the Calvin cycle to produce glucose?

Accepted Answer

A)  More cyclic photophosphorylation, less Z-scheme. 
B)  More Z-scheme photosynthesis, less cyclic photophosphorylation. 
C)  No significant difference. 
D)  Impossible to predict from the information provided. 
A)  More cyclic photophosphorylation, less Z-scheme. 
B)  More Z-scheme photosynthesis, less cyclic photophosphorylation. 
C)  No significant difference. 
D)  Impossible to predict from the information provided.

Question 16

Green plants contain

Accepted Answer

A)  only chlorophyll a. 
B)  only chlorophyll b. 
C)  both chlorophyll a and chlorophyll b. 
D)  bacteriochlorophyll. 
E)  chlorophyll a, chlorophyll b, and bacteriochlorophyll 
A)  only chlorophyll a. 
B)  only chlorophyll b. 
C)  both chlorophyll a and chlorophyll b. 
D)  bacteriochlorophyll. 
E)  chlorophyll a, chlorophyll b, and bacteriochlorophyll

Question 17

Cyanobacteria contain

Accepted Answer

A)  only chlorophyll a. 
B)  only chlorophyll b. 
C)  both chlorophyll a and chlorophyll b. 
D)  bacteriochlorophyll. 
E)  no chlorophyll at all 
A)  only chlorophyll a. 
B)  only chlorophyll b. 
C)  both chlorophyll a and chlorophyll b. 
D)  bacteriochlorophyll. 
E)  no chlorophyll at all

Question 18

The terminal electron acceptor during the light phase of photosynthesis in green plants is

Accepted Answer

A)  Hydrogen (H2 → H2O). 
B)  NAD+ ( → NADH). 
C)  NADP+ ( → NADPH). 
D)  Oxygen (O2 → H2O). 
E)  Sulfur ( → H2S). 
A)  Hydrogen (H2 → H2O). 
B)  NAD+ ( → NADH). 
C)  NADP+ ( → NADPH). 
D)  Oxygen (O2 → H2O). 
E)  Sulfur ( → H2S).

Question 19

Which of the following is NOT an intermediate in the C4 pathway?

Accepted Answer

A)  phosphoenolpyruvate 
B)  oxaloacetate 
C)  malate 
D)  fumarate 
A)  phosphoenolpyruvate 
B)  oxaloacetate 
C)  malate 
D)  fumarate

Question 20

The essential enzyme for the C4 pathway is

Accepted Answer

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

Exam 22: Photosynthesis

The nuclear gene for Rubisco codes for the catalytic subunit, while the regulatory gene is found in the chloroplast.

In order to regenerate ribulose 1,5 bisphosphate, the following reaction is required:

While actively engaging in photosynthesis under illumination,

After the CO2 fixation step in photosynthesis, the production of sugars takes place

The stoichiometric balance of the Calvin Cycle has 6 ribulose 1,5 bisphosphate 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 bisphosphate.

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

The earliest photosynthetic organisms most likely used water as an electron source.

The Hatch-Slack Pathway is important in tropical zones since, in order to conserve water, the pores of tropical leaves are very small.

In chloroplasts,

The first CO2 fixing reaction of the Hatch-Slack pathway is:

Bacterial products of photosynthesis, other than oxygen and sugars, can include all of these, except:

The production of ATP in photosynthesis

The transfer of electrons from water to NADP+ to produce oxygen and NADPH is a highly exergonic process.

The process of ATP synthesis in chloroplasts is referred to as

Green plants contain

Cyanobacteria contain

The terminal electron acceptor during the light phase of photosynthesis in green plants is

Which of the following is NOT an intermediate in the C4 pathway?

The essential enzyme for the C4 pathway is

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: 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

After the CO₂ fixation step in photosynthesis, the production of sugars takes place

The stoichiometric balance of the Calvin Cycle has 6 ribulose 1,5 bisphosphate 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 bisphosphate.

The first CO₂ fixing reaction of the Hatch-Slack pathway is:

The transfer of electrons from water to NADP⁺ to produce oxygen and NADPH is a highly exergonic process.

Which of the following is NOT an intermediate in the C₄ pathway?

The essential enzyme for the C₄ pathway is