Question 1

The D1 and D2 subunits of photosystem II:

Accepted Answer

A)  span the thylakoid membrane. 
B)  are similar to each other. 
C)  are homologous to the L and M chains of the bacterial center. 
D)  A and C. 
E)  A, B, and C. 
A)  span the thylakoid membrane. 
B)  are similar to each other. 
C)  are homologous to the L and M chains of the bacterial center. 
D)  A and C. 
E)  A, B, and C.

Question 2

How do herbicides such as diuron or atrazine work?

Accepted Answer

These inhibitors block electro

Question 3

How many chloroplasts does a typical plant cell have?

Accepted Answer

A)  1-100 
B)  200-500 
C)  > 1000 
D)  500-800 
E)  None of the above. 
A)  1-100 
B)  200-500 
C)  > 1000 
D)  500-800 
E)  None of the above.

Question 4

Describe the process of cyclic photophosphorylation.

Accepted Answer

In this pathway, electrons from reduced

Question 5

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: Membranous structures in a chloroplast that are stacked, flattened disks.

Accepted Answer

A) 960 nm 
B) magnesium 
C) ATP synthase 
D) chloroplasts 
E) thylakoids
F)copper
G)β-carotene
H)680 nm
I)FAD
J)chlorophyll a
K)ferredoxin b
L)resonance energy transfer 
A) 960 nm 
B) magnesium 
C) ATP synthase 
D) chloroplasts 
E) thylakoids
F)copper
G)β-carotene
H)680 nm
I)FAD
J)chlorophyll a
K)ferredoxin b
L)resonance energy transfer

Question 6

In the light reactions of photosynthesis, the cooperation between photosystem I and photosystem II creates a flow of electrons from H2O to ________________.

Accepted Answer

Question 7

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: This electron carrier of photosystem I is an iron-sulfur protein.

Accepted Answer

A) 960 nm 
B) magnesium 
C) ATP synthase 
D) chloroplasts 
E) thylakoids
F)copper
G)β-carotene
H)680 nm
I)FAD
J)chlorophyll a
K)ferredoxin b
L)resonance energy transfer 
A) 960 nm 
B) magnesium 
C) ATP synthase 
D) chloroplasts 
E) thylakoids
F)copper
G)β-carotene
H)680 nm
I)FAD
J)chlorophyll a
K)ferredoxin b
L)resonance energy transfer

Question 8

Why are chlorophylls good candidates for photoreceptors?

Accepted Answer

The conjugated network of sing

Question 9

Light absorption induces electron transfer from P680 to:

Accepted Answer

A)  pheophytin. 
B)  QH2. 
C)  cytochrome c. 
D)  chlorophyll 
E)  None of the above. 
A)  pheophytin. 
B)  QH2. 
C)  cytochrome c. 
D)  chlorophyll 
E)  None of the above.

Question 10

Stacked and unstacked regions of the thylakoid are arranged such that:

Accepted Answer

A)  photosystem I is located in the unstacked regions. 
B)  photosystem II is located in the stacked region. 
C)  ATP synthase occurs mainly in unstacked retions. 
D)  A and C. 
E)  A, B, and C. 
A)  photosystem I is located in the unstacked regions. 
B)  photosystem II is located in the stacked region. 
C)  ATP synthase occurs mainly in unstacked retions. 
D)  A and C. 
E)  A, B, and C.

Question 11

Choose the correct answer from the list below. Not all of the answers will be used.
-One of the accessory pigments in plants is ____________.

Accepted Answer

A) 960 nm 
B) magnesium 
C) ATP synthase 
D) chloroplasts 
E) thylakoids
F)copper
G)β-carotene
H)680 nm
I)FAD
J)chlorophyll a
K)ferredoxin b
L)resonance energy transfer 
A) 960 nm 
B) magnesium 
C) ATP synthase 
D) chloroplasts 
E) thylakoids
F)copper
G)β-carotene
H)680 nm
I)FAD
J)chlorophyll a
K)ferredoxin b
L)resonance energy transfer

Question 12

Choose the correct answer from the list below. Not all of the answers will be used.
-The principal photoreceptor in chloroplasts of green plants is ____________.

Accepted Answer

A) 960 nm 
B) magnesium 
C) ATP synthase 
D) chloroplasts 
E) thylakoids
F)copper
G)β-carotene
H)680 nm
I)FAD
J)chlorophyll a
K)ferredoxin b
L)resonance energy transfer 
A) 960 nm 
B) magnesium 
C) ATP synthase 
D) chloroplasts 
E) thylakoids
F)copper
G)β-carotene
H)680 nm
I)FAD
J)chlorophyll a
K)ferredoxin b
L)resonance energy transfer

Question 13

What are the likely reasons that manganese evolved as the ion used in photosystem II?

Accepted Answer

Manganese can exist in multipl

Question 14

Electrons flow from photosystem I to photosystem II through the ________________ complex.

Accepted Answer

The answer of Electrons flow from photosystem I to photosystem...

Question 15

How is it possible to make ATP without generating NADPH?

Accepted Answer

In cyclic photophosphorylation, the elec

Question 16

The inner membrane of a chloroplast surrounds a space called the ________________.

Accepted Answer

The answer of The inner membrane of a chloroplast surrounds...

Question 17

Choose the correct answer from the list below. Not all of the answers will be used.
-The prosthetic group of ferredoxin-NADP+ reductase is ____________.

Accepted Answer

A) 960 nm 
B) magnesium 
C) ATP synthase 
D) chloroplasts 
E) thylakoids
F)copper
G)β-carotene
H)680 nm
I)FAD
J)chlorophyll a
K)ferredoxin b
L)resonance energy transfer 
A) 960 nm 
B) magnesium 
C) ATP synthase 
D) chloroplasts 
E) thylakoids
F)copper
G)β-carotene
H)680 nm
I)FAD
J)chlorophyll a
K)ferredoxin b
L)resonance energy transfer

Question 18

How many protons are transferred into the thylakoid lumen after four photons have been absorbed by the photosystems?

Accepted Answer

A)  2 
B)  12 
C)  18 
D)  4 
E)  8 
A)  2 
B)  12 
C)  18 
D)  4 
E)  8

Question 19

How is light used in photosynthesis?

Accepted Answer

A)  The light is necessary to make the chlorophyll green, so the pigment can transmit electrons. 
B)  The light is used to generate high-energy electrons with great reducing potential. 
C)  The light provides heat energy for the chloroplasts. 
D)  The light is absorbed by oxygen, which is converted into water. 
E)  None of the above. 
A)  The light is necessary to make the chlorophyll green, so the pigment can transmit electrons. 
B)  The light is used to generate high-energy electrons with great reducing potential. 
C)  The light provides heat energy for the chloroplasts. 
D)  The light is absorbed by oxygen, which is converted into water. 
E)  None of the above.

Question 20

The process in which a positive charge forms on one molecule by the loss of a photoexcited electron, and a negative charge forms on another by the gain of an electron is referred to as ________________.

Accepted Answer

photoinduc

Exam 22: The Light Reactions

The D1 and D2 subunits of photosystem II:

How do herbicides such as diuron or atrazine work?

How many chloroplasts does a typical plant cell have?

Describe the process of cyclic photophosphorylation.

Choose the correct answer from the list below. Not all of the answers will be used. -____________: Membranous structures in a chloroplast that are stacked, flattened disks.

In the light reactions of photosynthesis, the cooperation between photosystem I and photosystem II creates a flow of electrons from H2O to ________________.

Choose the correct answer from the list below. Not all of the answers will be used. -____________: This electron carrier of photosystem I is an iron-sulfur protein.

Why are chlorophylls good candidates for photoreceptors?

Light absorption induces electron transfer from P680 to:

Stacked and unstacked regions of the thylakoid are arranged such that:

Choose the correct answer from the list below. Not all of the answers will be used. -One of the accessory pigments in plants is ____________.

Choose the correct answer from the list below. Not all of the answers will be used. -The principal photoreceptor in chloroplasts of green plants is ____________.

What are the likely reasons that manganese evolved as the ion used in photosystem II?

Electrons flow from photosystem I to photosystem II through the ________________ complex.

How is it possible to make ATP without generating NADPH?

The inner membrane of a chloroplast surrounds a space called the ________________.

Choose the correct answer from the list below. Not all of the answers will be used. -The prosthetic group of ferredoxin-NADP+ reductase is ____________.

How many protons are transferred into the thylakoid lumen after four photons have been absorbed by the photosystems?

How is light used in photosynthesis?

The process in which a positive charge forms on one molecule by the loss of a photoexcited electron, and a negative charge forms on another by the gain of an electron is referred to as ________________.

Biochemistry and the Unity of Life

Water, Weak Bonds, and the Generation of Order Out of Chaos

Amino Acids

Protein Three-Dimensional Structure

Techniques in Protein Biochemistry

Basic Concepts of Enzyme Action

Kinetics and Regulation

Mechanisms and Inhibitors

Hemoglobin: an Allosteric Protein

Carbohydrates

Lipids

Membrane Structure and Function

Signal Transduction Pathways

Digestion: Turning a Meal Into Cellular Biochemicals

Metabolism: Basic Concepts and Design

Glycolysis

Gluconeogenesis

Preparation for the Cycle

Harvesting Electrons From the Cycle

The Electron Transport Chain

The Proton-Motive Force

The Calvin Cycle

Glycogen Degradation

Glycogen Synthesis

The Pentose Phosphate Pathway

Fatty Acid Degredation

Fatty Acid Synthesis

Lipid Synthesis

Amino Acid Degradation and the Urea Cycle

Amino Acids Synthesis

Nucleotide Metabolism

The Structure of Informational Macromolecules: Dna and Rna

DNA Replication

DNA Repair and Recombination

RNA Synthesis and Regulation in Prokaryotes

Gene Expression in Eukaryotes

RNA Processing in Eukaryotes

The Genetic Code

The Mechanism of Protein Synthesis

Recombinant DNA Techniques

Filters

In the light reactions of photosynthesis, the cooperation between photosystem I and photosystem II creates a flow of electrons from H₂O to ________________.