Question 1

All of the following are involved in the production of biochemical energy from light EXCEPT:

Accepted Answer

A)  electron transfer. 
B)  Q-cycle. 
C)  transmembrane pH gradient. 
D)  ribulose-1,5-bisphosphate. 
E)  chlorophyll. 
A)  electron transfer. 
B)  Q-cycle. 
C)  transmembrane pH gradient. 
D)  ribulose-1,5-bisphosphate. 
E)  chlorophyll.

Question 2

Spinach chloroplasts are illuminated in the absence of ADP and Pi, then the light is turned off and ADP and Pi are added. ATP is then synthesized for a short time in the dark. Which of the following best explains this?
I.
ATP is generated from the proton gradient accumulated in the light reactions.
II.
ATP synthesis stops after the proton gradient dissipates.
III.
ATP can be generated in the dark reactions if it becomes necessary for the plant to survive.

Accepted Answer

A)  I, III 
B)  I only 
C)  II only 
D)  I, II 
E)  II, III 
A)  I, III 
B)  I only 
C)  II only 
D)  I, II 
E)  II, III

Question 3

The reaction, Ribulose-5-phosphate + ATP → Ribulose-1,5-bisphosphate + ADP, is catalyzed by:

Accepted Answer

A)  phosphopentose isomerase. 
B)  phosphoribulose kinase. 
C)  ribulose bisphosphate carboxylase. 
D)  phosphopentose epimerase. 
E)  transketolase. 
A)  phosphopentose isomerase. 
B)  phosphoribulose kinase. 
C)  ribulose bisphosphate carboxylase. 
D)  phosphopentose epimerase. 
E)  transketolase.

Question 4

Which statement regarding light is NOT true?

Accepted Answer

A)  the energy of a photon of light is calculated by E=hν 
B)  the energy of 700nm light is greater than that of 400nm light 
C)  photosynthesis allows two electrons to flow for each pair of photons absorbed per center 
D)  the quantum yield of photosynthesis can be described as CO2 fixed per photon absorbed, or O2 evolved per photon absorbed 
E)  none are true 
A)  the energy of a photon of light is calculated by E=hν 
B)  the energy of 700nm light is greater than that of 400nm light 
C)  photosynthesis allows two electrons to flow for each pair of photons absorbed per center 
D)  the quantum yield of photosynthesis can be described as CO2 fixed per photon absorbed, or O2 evolved per photon absorbed 
E)  none are true

Question 5

Many chlorophyll molecules absorb light and direct the energy to the reactive centers. The transfer of this absorbed energy is called:

Accepted Answer

A)  fluorescence transfer. 
B)  redox transfer. 
C)  resonance energy transfer. 
D)  photochemical emission. 
E)  energy transduction. 
A)  fluorescence transfer. 
B)  redox transfer. 
C)  resonance energy transfer. 
D)  photochemical emission. 
E)  energy transduction.

Question 6

Discuss the general formulation of the overall reaction of photosynthesis as stated by van Niel.​

Accepted Answer

​A general formulation of the overall re

Question 7

Chlorophyll is located in the ____ of the chloroplast.

Accepted Answer

A)  thylakoid membranes associated with proteins 
B)  thylakoid spaces associated with rubisco 
C)  stroma 
D)  inner membrane space 
E)  outer membrane 
A)  thylakoid membranes associated with proteins 
B)  thylakoid spaces associated with rubisco 
C)  stroma 
D)  inner membrane space 
E)  outer membrane

Question 8

Discuss the photosystem II supramolecular complex. ​

Accepted Answer

Overall photosynthetic electron transfer

Question 9

Chloroplasts differ from mitochondria in that:

Accepted Answer

A)  chloroplasts can not generate ATP. 
B)  only mitochondria have a double membrane. 
C)  in chloroplasts, the proton gradient is generated between the thylakoid lumen and the stroma. 
D)  only the mitochondrion has DNA, RNA and ribosomes. 
E)  chloroplasts do not utilize a Q-cycle. 
A)  chloroplasts can not generate ATP. 
B)  only mitochondria have a double membrane. 
C)  in chloroplasts, the proton gradient is generated between the thylakoid lumen and the stroma. 
D)  only the mitochondrion has DNA, RNA and ribosomes. 
E)  chloroplasts do not utilize a Q-cycle.

Question 10

Photosynthetic phosphorylation and oxidative phosphorylation are similar processes. All of the following are common to BOTH processes EXCEPT:

Accepted Answer

A)  both have fixed and mobile electron carriers. 
B)  both contain cytochromes in their electron carrier chains. 
C)  both produce NADPH to be used in the reductive pentose phosphate pathway (Calvin cycle). 
D)  both represent a major route of ATP synthesis. 
E)  both have quinones as electron carriers. 
A)  both have fixed and mobile electron carriers. 
B)  both contain cytochromes in their electron carrier chains. 
C)  both produce NADPH to be used in the reductive pentose phosphate pathway (Calvin cycle). 
D)  both represent a major route of ATP synthesis. 
E)  both have quinones as electron carriers.

Question 11

The product(s) of the R. viridis photosynthetic reaction center is (are):

Accepted Answer

A)  mobile reduced quinone. 
B)  NADPH. 
C)  O2. 
D)  reduced ferredoxin. 
E)  protons. 
A)  mobile reduced quinone. 
B)  NADPH. 
C)  O2. 
D)  reduced ferredoxin. 
E)  protons.

Question 12

Many of the enzymes of the Calvin cycle are also involved in ____; however, the glyceraldehyde-3-phosphate dehydrogenase of the Calvin cycle is specific for ____.

Accepted Answer

A)  glycolysis; NADPH 
B)  citric acid cycle; NADH 
C)  glycolysis; FADH2 
D)  citric acid cycle, NADPH 
E)  none of the above 
A)  glycolysis; NADPH 
B)  citric acid cycle; NADH 
C)  glycolysis; FADH2 
D)  citric acid cycle, NADPH 
E)  none of the above

Question 13

What type of enzyme catalyzes the reaction?
Sedoheptulose-1,7-bisphosphate + H2O ⇔ sedoheptulose-7-phosphate + Pi

Accepted Answer

A)  hydrolase 
B)  isomerase 
C)  aldolase 
D)  mutase 
E)  lyase 
A)  hydrolase 
B)  isomerase 
C)  aldolase 
D)  mutase 
E)  lyase

Question 14

Which of the following set of pathways is similar between plants and animals?
I.
Electron transport and the dark reactions of photosynthesis
II.
Electron transport and the light reactions of photosynthesis
III.
The Hatch-Slack pathway (C-4) and pyruvate carboxylase

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I, III 
E)  II, III 
A)  I only 
B)  II only 
C)  III only 
D)  I, III 
E)  II, III

Question 15

Characteristics of chlorophyll include all EXCEPT:

Accepted Answer

A)  iron-containing porphyrin. 
B)  planar conjugated porphyrin ring. 
C)  long-chain phytol tail. 
D)  delocalized π electrons in the aromatic ring. 
E)  photoexcitable electrons. 
A)  iron-containing porphyrin. 
B)  planar conjugated porphyrin ring. 
C)  long-chain phytol tail. 
D)  delocalized π electrons in the aromatic ring. 
E)  photoexcitable electrons.

Question 16

All are correct statements about rubisco EXCEPT:

Accepted Answer

A)  ribulose-1,5-bisphosphate and carbon dioxide are both substrates. 
B)  the catalytic site has both carboxylase and oxygenase activity. 
C)  it is found in the chloroplast stroma. 
D)  it releases two molecules of glyceraldehyde-3-phosphate as products. 
E)  it may be the most abundant enzyme in plants. 
A)  ribulose-1,5-bisphosphate and carbon dioxide are both substrates. 
B)  the catalytic site has both carboxylase and oxygenase activity. 
C)  it is found in the chloroplast stroma. 
D)  it releases two molecules of glyceraldehyde-3-phosphate as products. 
E)  it may be the most abundant enzyme in plants.

Question 17

All are correct about reactions of the Calvin cycle EXCEPT:

Accepted Answer

A)  ATP is hydrolyzed to ADP. 
B)  NADP+ is reduced to NADPH. 
C)  an intermediate is fructose-1,6-bisphosphate. 
D)  some of the enzymes are shared by glycolysis. 
E)  involves a ribulose-5-phosphate kinase. 
A)  ATP is hydrolyzed to ADP. 
B)  NADP+ is reduced to NADPH. 
C)  an intermediate is fructose-1,6-bisphosphate. 
D)  some of the enzymes are shared by glycolysis. 
E)  involves a ribulose-5-phosphate kinase.

Question 18

The photosynthetic unit includes all EXCEPT:

Accepted Answer

A)  antenna chlorophylls. 
B)  the reactive center. 
C)  oxidation of chlorophyll to a cationic free radical, Chl .+ . 
D)  the cationic free radical is the Mg2+ ion. 
E)  all are true. 
A)  antenna chlorophylls. 
B)  the reactive center. 
C)  oxidation of chlorophyll to a cationic free radical, Chl .+ . 
D)  the cationic free radical is the Mg2+ ion. 
E)  all are true.

Question 19

Although the ratio of carboxylase to oxygenase activity of rubisco is about ____ to one, the oxygenase activity diminishes plant productivity because of the loss of ____.

Accepted Answer

A)  one; rubisco 
B)  two; ribulose-5-phosphate 
C)  3-4; ribulose-1,5-bisphosphate 
D)  6-8; rubisco 
E)  8-10; ribulose-5-phosphate 
A)  one; rubisco 
B)  two; ribulose-5-phosphate 
C)  3-4; ribulose-1,5-bisphosphate 
D)  6-8; rubisco 
E)  8-10; ribulose-5-phosphate

Question 20

The light-induced changes in chloroplasts which regulate key Calvin cycle enzymes include all EXCEPT:

Accepted Answer

A)  activation of rubisco activase. 
B)  Mg2+ efflux from the thylakoid lumen. 
C)  changes in stromal pH. 
D)  generation of reducing power. 
E)  all are true. 
A)  activation of rubisco activase. 
B)  Mg2+ efflux from the thylakoid lumen. 
C)  changes in stromal pH. 
D)  generation of reducing power. 
E)  all are true.

Exam 21: Photosynthesis

All of the following are involved in the production of biochemical energy from light EXCEPT:

The reaction, Ribulose-5-phosphate + ATP → Ribulose-1,5-bisphosphate + ADP, is catalyzed by:

Which statement regarding light is NOT true?

Many chlorophyll molecules absorb light and direct the energy to the reactive centers. The transfer of this absorbed energy is called:

Discuss the general formulation of the overall reaction of photosynthesis as stated by van Niel.​

Chlorophyll is located in the ____ of the chloroplast.

Discuss the photosystem II supramolecular complex. ​

Chloroplasts differ from mitochondria in that:

Photosynthetic phosphorylation and oxidative phosphorylation are similar processes. All of the following are common to BOTH processes EXCEPT:

The product(s) of the R. viridis photosynthetic reaction center is (are):

Many of the enzymes of the Calvin cycle are also involved in ____; however, the glyceraldehyde-3-phosphate dehydrogenase of the Calvin cycle is specific for ____.

What type of enzyme catalyzes the reaction? Sedoheptulose-1,7-bisphosphate + H2O ⇔ sedoheptulose-7-phosphate + Pi

Which of the following set of pathways is similar between plants and animals? I. Electron transport and the dark reactions of photosynthesis II. Electron transport and the light reactions of photosynthesis III. The Hatch-Slack pathway (C-4) and pyruvate carboxylase

Characteristics of chlorophyll include all EXCEPT:

All are correct statements about rubisco EXCEPT:

All are correct about reactions of the Calvin cycle EXCEPT:

The photosynthetic unit includes all EXCEPT:

Although the ratio of carboxylase to oxygenase activity of rubisco is about ____ to one, the oxygenase activity diminishes plant productivity because of the loss of ____.

The light-induced changes in chloroplasts which regulate key Calvin cycle enzymes include all EXCEPT:

The Facts of Life: Chemistry Is the Logic of Biological Phenomena

Water: the Medium of Life

Thermodynamics of Biological Systems

Amino Acids and the Peptide Bond

Proteins: Their Primary Structure and Biological Functions

Proteins: Secondary, Tertiary, and Quaternary Structure

Carbohydrates and the Glycoconjugates of Cell Surfaces

Lipids

Membranes and Membrane Transport

Nucleotides and Nucleic Acids

Structure of Nucleic Acids

Recombinant Dna, Cloning, Chimeric Genes, and Synthetic Biology

Enzymeskinetics and Specificity

Mechanisms of Enzyme Action

Enzyme Regulation

Molecular Motors

Metabolism: an Overview

Glycolysis

The Tricarboxylic Acid Cycle

Electron Transport and Oxidative Phosphorylation

Gluconeogenesis, Glycogen Metabolism, and the Pentose Phosphate Pathway

Fatty Acid Catabolism

Lipid Biosynthesis

Nitrogen Acquisition and Amino Acid Metabolism

Synthesis and Degradation of Nucleotides

Metabolic Integration and Organ Specialization

Dna Metabolism: Replication, Recombination, and Repair

Transcription and the Regulation of Gene Expression

Protein Synthesis

Completing the Protein Life Cycle: Folding, Processing, and Degradation

The Reception and Transmission of Extracellular Information

Filters

Discuss the general formulation of the overall reaction of photosynthesis as stated by van Niel.

Discuss the photosystem II supramolecular complex.

Many of the enzymes of the Calvin cycle are also involved in ; however, the glyceraldehyde-3-phosphate dehydrogenase of the Calvin cycle is specific for .

What type of enzyme catalyzes the reaction? Sedoheptulose-1,7-bisphosphate + H₂O ⇔ sedoheptulose-7-phosphate + P_i

Although the ratio of carboxylase to oxygenase activity of rubisco is about to one, the oxygenase activity diminishes plant productivity because of the loss of .