Question 1

The dark phase of photosynthesis is closest to this other metabolic process:

Accepted Answer

A)  Anaerobic Glycolysis. 
B)  The Pentose Phosphate Pathway. 
C)  The Kreb's Cycle. 
D)  The Electron Transport System 
E)  The reactions in the dark phase are not similar to any other pathway. 
A)  Anaerobic Glycolysis. 
B)  The Pentose Phosphate Pathway. 
C)  The Kreb's Cycle. 
D)  The Electron Transport System 
E)  The reactions in the dark phase are not similar to any other pathway. B

Question 2

The actual CO2 fixation process in photosynthesis is the addition of CO2 into a 5 carbon compound to yield

Accepted Answer

A)  ribulose 5-phosphate. 
B)  ribulose 1,5-bisphosphate. 
C)  erythrose 4-phosphate. 
D)  3-phosphoglycerate. 
E)  glucose 6-phosphate 
A)  ribulose 5-phosphate. 
B)  ribulose 1,5-bisphosphate. 
C)  erythrose 4-phosphate. 
D)  3-phosphoglycerate. 
E)  glucose 6-phosphate D

Question 3

The light phase of photosynthesis is closest to which other metabolic process?

Accepted Answer

A)  Anaerobic Glycolysis. 
B)  The Pentose Monophosphate Pathway. 
C)  The Kreb's Cycle. 
D)  The Electron Transport System 
E)  The reactions in the light phase are not similar to any other pathway. 
A)  Anaerobic Glycolysis. 
B)  The Pentose Monophosphate Pathway. 
C)  The Kreb's Cycle. 
D)  The Electron Transport System 
E)  The reactions in the light phase are not similar to any other pathway. D

Question 4

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

Question 5

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 6

The region of the chloroplast between the inner membrane and the thylakoid membrane is called

Accepted Answer

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

Question 7

The reactions during the light phase of photosynthesis include the following:
1)Light absorption in photosystem I
2)Light absorption in photosystem II
3)Formation of O2 from water
4)Formation of NADPH
5)Formation of ATP
The order of the reactions is as follows:

Accepted Answer

A)  4 → 2 → 3 → 1 → 5. 
B)  3 → 2 → 5 → 1 → 4. 
C)  3 → 1 → 5 → 2 → 4. 
D)  4 → 1 → 5 → 2 → 3. 
E)  5 → 2 → 4 → 1 → 3. 
A)  4 → 2 → 3 → 1 → 5. 
B)  3 → 2 → 5 → 1 → 4. 
C)  3 → 1 → 5 → 2 → 4. 
D)  4 → 1 → 5 → 2 → 3. 
E)  5 → 2 → 4 → 1 → 3.

Question 8

The enzyme, ribulose 1,5 bisphosphate carboxylase (Rubisco), is:

Accepted Answer

A)  one of the most abundant proteins in nature. 
B)  about 15% of the protein content of the chloroplast 
C)  a multisubunit enzyme 
D)  consistent with the endosymbiotic origin for organelles such as chloroplasts and mitochondria 
E)  all of these 
A)  one of the most abundant proteins in nature. 
B)  about 15% of the protein content of the chloroplast 
C)  a multisubunit enzyme 
D)  consistent with the endosymbiotic origin for organelles such as chloroplasts and mitochondria 
E)  all of these

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

It is believed that the ratio of cyclic electron transport to Z-scheme photosynthesis changes in response to metabolic demands. If a plant were using the C4 Hatch-Slack pathway, how would it alter these processes compared to a plant just performing the standard C3 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 12

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

Accepted Answer

A) True 
 B)False

Question 13

The C4 pathway for carbon dioxide fixation has what requirement compared to the Calvin cycle?

Accepted Answer

A)  requires more ATP 
B)  requires less ATP 
C)  requires more NADPH 
D)  requires less NADPH 
E)  none of these 
A)  requires more ATP 
B)  requires less ATP 
C)  requires more NADPH 
D)  requires less NADPH 
E)  none of these

Question 14

The electrons used in photosynthesis come first from this molecule or atom:

Accepted Answer

A)  Hydrogen (H2). 
B)  Manganese atom (Mn). 
C)  NADPH 
D)  Oxygen (O2). 
E)  Water (H2O). 
A)  Hydrogen (H2). 
B)  Manganese atom (Mn). 
C)  NADPH 
D)  Oxygen (O2). 
E)  Water (H2O).

Question 15

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

Accepted Answer

A)  cyctochrome c 
B)  pheophytin 
C)  plastocyanin 
D)  ferredoxin 
E)  none of these 
A)  cyctochrome c 
B)  pheophytin 
C)  plastocyanin 
D)  ferredoxin 
E)  none of these

Question 16

Which of the following is true concerning chlorophyll?

Accepted Answer

A)  It abosrbs green light, which is why leaves are green 
B)  Chlorophyll a and b each have peaks of absorption at two different wavelengths 
C)  Chlorophyll a has a maximum absorption at 600 nm 
D)  Between the two chlorophylls, light is absorbed between 400 and 700 nm 
E)  none of these 
A)  It abosrbs green light, which is why leaves are green 
B)  Chlorophyll a and b each have peaks of absorption at two different wavelengths 
C)  Chlorophyll a has a maximum absorption at 600 nm 
D)  Between the two chlorophylls, light is absorbed between 400 and 700 nm 
E)  none of these

Question 17

Ferredoxin is important in photosynthesis in forming NADH.

Accepted Answer

A) True 
 B)False

Question 18

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 19

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 20

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.

Exam 22: Photosynthesis

The dark phase of photosynthesis is closest to this other metabolic process:

The actual CO2 fixation process in photosynthesis is the addition of CO2 into a 5 carbon compound to yield

The light phase of photosynthesis is closest to which other metabolic process?

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

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

The region of the chloroplast between the inner membrane and the thylakoid membrane is called

The reactions during the light phase of photosynthesis include the following: 1)Light absorption in photosystem I 2)Light absorption in photosystem II 3)Formation of O2 from water 4)Formation of NADPH 5)Formation of ATP The order of the reactions is as follows:

The enzyme, ribulose 1,5 bisphosphate carboxylase (Rubisco), is:

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

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

It is believed that the ratio of cyclic electron transport to Z-scheme photosynthesis changes in response to metabolic demands. If a plant were using the C4 Hatch-Slack pathway, how would it alter these processes compared to a plant just performing the standard C3 Calvin cycle to produce glucose?

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

The C4 pathway for carbon dioxide fixation has what requirement compared to the Calvin cycle?

The electrons used in photosynthesis come first from this molecule or atom:

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

Which of the following is true concerning chlorophyll?

Ferredoxin is important in photosynthesis in forming NADH.

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?

In the Calvin cycle a reshuffling of intermediates is necessary

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

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

The actual CO₂ fixation process in photosynthesis is the addition of CO₂ into a 5 carbon compound to yield

The reactions during the light phase of photosynthesis include the following: 1)Light absorption in photosystem I 2)Light absorption in photosystem II 3)Formation of O₂ from water 4)Formation of NADPH 5)Formation of ATP The order of the reactions is as follows:

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

The C₄ pathway for carbon dioxide fixation has what requirement compared to the Calvin cycle?

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

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?