Question 1

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 
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 A

Question 2

Which of the following is the mobile electron carrier from Photosystem II to the cytochrome b6f complex?

Accepted Answer

A)  plastoquinone 
B)  pheophytin 
C)  plastocyanin 
D)  ferredoxin 
A)  plastoquinone 
B)  pheophytin 
C)  plastocyanin 
D)  ferredoxin A

Question 3

In the first reaction of carbon dioxide fixation in photosynthesis,CO2 reacts with

Accepted Answer

A)  ribulose 5-phosphate. 
B)  ribulose 1,5-bisphosphate. 
C)  ribose 5-phosphate. 
D)  xylulose 5-phosphate. 
A)  ribulose 5-phosphate. 
B)  ribulose 1,5-bisphosphate. 
C)  ribose 5-phosphate. 
D)  xylulose 5-phosphate. B

Question 4

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 5

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.

Question 6

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 7

While chlorophyll contains a different metal ion,its ring structure is very similar to the ring structure in steroids.

Accepted Answer

A) True 
 B)False

Question 8

Photosynthetic bacteria which do not use water as the ultimate source of electrons

Accepted Answer

A)  only contain chlorophyll a. 
B)  only contain chlorophyll b. 
C)  do not produce oxygen. 
D)  have two photosystems. 
A)  only contain chlorophyll a. 
B)  only contain chlorophyll b. 
C)  do not produce oxygen. 
D)  have two photosystems.

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Which of these statements concerning the Calvin Cycle is false?

Accepted Answer

A)  There is significant overlap between these reactions and glycolysis. 
B)  During the process, ATP is used with an ADP product. 
C)  Fructose 1,6 bisphosphate is an intermediate in this pathway. 
D)  NADP+ is converted to NADPH during this pathway. 
E)  At least one reduction reaction occurs during this pathway. 
A)  There is significant overlap between these reactions and glycolysis. 
B)  During the process, ATP is used with an ADP product. 
C)  Fructose 1,6 bisphosphate is an intermediate in this pathway. 
D)  NADP+ is converted to NADPH during this pathway. 
E)  At least one reduction reaction occurs during this pathway.

Question 11

Rubisco is a rare example of an enzyme whose genetic information is found in two different cellular compartments.

Accepted Answer

A) True 
 B)False

Question 12

Anaerobic,photosynthetic bacteria differ from green plants in that they only have one type of chlorophyll.

Accepted Answer

A) True 
 B)False

Question 13

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. 
A)  oxidative phosphorylation. 
B)  photophosphorylation 
C)  reductive phosphorylation 
D)  substrate-level phosphorylation.

Question 14

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 15

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 16

The Calvin Cycle for CO2 fixation uses most of the same reactions as the pentose phosphate pathway.

Accepted Answer

A) True 
 B)False

Question 17

The key element at the center of chlorophyll is

Accepted Answer

A)  chlorine. 
B)  copper. 
C)  iron. 
D)  magnesium. 
E)  manganese. 
A)  chlorine. 
B)  copper. 
C)  iron. 
D)  magnesium. 
E)  manganese.

Question 18

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 19

Presence of oxygen can poison the reaction of Rubisco,due to an alternate reaction in which the ribulose 1,5 bisphosphate is oxidized,rather than reacting with CO2

Accepted Answer

A) True 
 B)False

Question 20

Where does the actual CO2 fixation process takes place?

Accepted Answer

A)  the stroma. 
B)  the thylakoid space. 
C)  the intermembrane space. 
D)  the cytosol. 
A)  the stroma. 
B)  the thylakoid space. 
C)  the intermembrane space. 
D)  the cytosol.

Exam 22: Photosynthesis

In chloroplasts,

Which of the following is the mobile electron carrier from Photosystem II to the cytochrome b6f complex?

In the first reaction of carbon dioxide fixation in photosynthesis,CO2 reacts with

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

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

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

While chlorophyll contains a different metal ion,its ring structure is very similar to the ring structure in steroids.

Photosynthetic bacteria which do not use water as the ultimate source of electrons

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

Which of these statements concerning the Calvin Cycle is false?

Rubisco is a rare example of an enzyme whose genetic information is found in two different cellular compartments.

Anaerobic,photosynthetic bacteria differ from green plants in that they only have one type of chlorophyll.

The process of ATP synthesis in chloroplasts is referred to as

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

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 Calvin Cycle for CO2 fixation uses most of the same reactions as the pentose phosphate pathway.

The key element at the center of chlorophyll is

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

Presence of oxygen can poison the reaction of Rubisco,due to an alternate reaction in which the ribulose 1,5 bisphosphate is oxidized,rather than reacting with CO2

Where does the actual CO2 fixation process takes place?

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

Which of the following is the mobile electron carrier from Photosystem II to the cytochrome b₆f complex?

In the first reaction of carbon dioxide fixation in photosynthesis,CO₂ reacts with

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

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 Calvin Cycle for CO₂ fixation uses most of the same reactions as the pentose phosphate pathway.

Presence of oxygen can poison the reaction of Rubisco,due to an alternate reaction in which the ribulose 1,5 bisphosphate is oxidized,rather than reacting with CO₂

Where does the actual CO₂ fixation process takes place?