Question 1

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 2

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.

Question 3

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 4

​ _____ is a photosynthetic pigment that differs from chlorophyll only in having two hydrogens atoms in place of one magnesium atom.

Accepted Answer

A)  Phycobiliprotein 
B)  Bacteriorhodopsin 
C)  Xanthophyll 
D)  Pheophytin 
A)  Phycobiliprotein 
B)  Bacteriorhodopsin 
C)  Xanthophyll 
D)  Pheophytin

Question 5

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 bis phosphate 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 bis phosphate 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 6

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 7

In order to regenerate ribulose 1,5 bis phosphate, 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 8

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 9

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 10

During Z-scheme photosynthesis, ferredoxin oxidizes NADPH.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following correctly describes a major difference between pheophytins and chlorophylls?

Accepted Answer

A)  Pheophytins contain iron in their centers while chlorophylls contain magnesium. 
B)  Chlorophylls contain iron in their centers while pheophytins contain magnesium. 
C)  Pheophytins contain no metal ion in their centers. 
D)  Pheophytins aren't at all like chlorophylls, but are quinones. 
E)  none of these 
A)  Pheophytins contain iron in their centers while chlorophylls contain magnesium. 
B)  Chlorophylls contain iron in their centers while pheophytins contain magnesium. 
C)  Pheophytins contain no metal ion in their centers. 
D)  Pheophytins aren't at all like chlorophylls, but are quinones. 
E)  none of these

Question 12

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 13

​ Explain the significance of thylakoid disks in the process of photosynthesis.

Accepted Answer

Thylakoid disks are contained within chl

Question 14

Which of the following is true?

Accepted Answer

A)  A protein with a manganese ion is key to the conversion of O2 to water 
B)  The electron transport chain in photosynthesis is identical to the one in mitochondria 
C)  Parts of the electron transport chain in photosynthesis are similar to the electron transport chain in mitochondria 
D)  Photosynthesis is the exact opposite of respiration 
E)  none of these 
A)  A protein with a manganese ion is key to the conversion of O2 to water 
B)  The electron transport chain in photosynthesis is identical to the one in mitochondria 
C)  Parts of the electron transport chain in photosynthesis are similar to the electron transport chain in mitochondria 
D)  Photosynthesis is the exact opposite of respiration 
E)  none of these

Question 15

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 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

A specialized pair of chlorophylls exists at

Accepted Answer

A)  the antenna complexes. 
B)  the accessory pigments. 
C)  the reaction centers. 
D)  the stroma. 
E)  the bottom of the roots in most plants 
A)  the antenna complexes. 
B)  the accessory pigments. 
C)  the reaction centers. 
D)  the stroma. 
E)  the bottom of the roots in most plants

Question 18

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 19

The enzyme ribulose 1,5- bis phosphate carboxylase

Accepted Answer

A)  consists of eight catalytic subunits encoded by a chloroplast and eight regulatory subunits encoded by a nuclear gene. 
B)  is difficult to isolate and study because it occurs in small amount in plant cells. 
C)  is nonallosteric. 
D)  is not involved in reactions linked to oxygen. 
A)  consists of eight catalytic subunits encoded by a chloroplast and eight regulatory subunits encoded by a nuclear gene. 
B)  is difficult to isolate and study because it occurs in small amount in plant cells. 
C)  is nonallosteric. 
D)  is not involved in reactions linked to oxygen.

Question 20

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 synthesizing starch from the glucose produced, 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.

Exam 22: Photosynthesis

The process of ATP synthesis in chloroplasts is referred to as

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

Which of the following is true concerning chlorophyll?

​ _____ is a photosynthetic pigment that differs from chlorophyll only in having two hydrogens atoms in place of one magnesium atom.

Which of these statements concerning the Calvin Cycle is false ?

Cyanobacteria contain

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

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

During Z-scheme photosynthesis, ferredoxin oxidizes NADPH.

Which of the following correctly describes a major difference between pheophytins and chlorophylls?

​ Explain the significance of thylakoid disks in the process of photosynthesis.

Which of the following is true?

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

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

A specialized pair of chlorophylls exists at

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

The enzyme ribulose 1,5- bis phosphate carboxylase

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

_____ is a photosynthetic pigment that differs from chlorophyll only in having two hydrogens atoms in place of one magnesium atom.

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

Explain the significance of thylakoid disks in the process of photosynthesis.

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