Question 1

The light-induced electron transfer in photosynthesis results in the transfer of ___________ into the thylakoid space.

Accepted Answer

H⁺ or protons

Question 2

Give the overall net equation as catalyzed by the "Z scheme" of photosynthesis.

Accepted Answer

2 H₂O + 2 NADP⁺ + 10 H⁺_strona → O₂ + 2 NADPH + 12H⁺_{thylakoid lumen}

Question 3

Which of the following is/are light harvesting molecules?

Accepted Answer

A)  vitamin D 
B)  carotenoids 
C)  chlorophyll b 
D)  plastocyanin 
E)  carotenoids and chlorophyll b 
A)  vitamin D 
B)  carotenoids 
C)  chlorophyll b 
D)  plastocyanin 
E)  carotenoids and chlorophyll b E

Question 4

In green plant photosynthesis,how many protons are transferred into the thylakoid lumen after absorption of four photons to PSII and four photons to PSI?

Accepted Answer

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

Question 5

The inner membrane of a chloroplast surrounds a compartment called the _____________.

Accepted Answer

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

Question 6

Describe the process of cyclic photophosphorylation.

Accepted Answer

In this pathway,electrons from reduced f

Question 7

What structure within the chloroplast resembles a flattened disk?

Accepted Answer

A)  photosystem I 
B)  photosystem II 
C)  stroma lamellae 
D)  thylakoid 
E)  cytochrome bf complex 
A)  photosystem I 
B)  photosystem II 
C)  stroma lamellae 
D)  thylakoid 
E)  cytochrome bf complex

Question 8

Light absorption induces electron transfer from P680 to

Accepted Answer

A)  pheophytin. 
B)  Q. 
C)  cytochrome c. 
D)  chlorophyll a. 
E)  None of the answers is correct. 
A)  pheophytin. 
B)  Q. 
C)  cytochrome c. 
D)  chlorophyll a. 
E)  None of the answers is correct.

Question 9

How do herbicides such as diuron or atrazine work?

Accepted Answer

These inhibitors block electro

Question 10

In _______________,ATP is generated without the concomitant formation of NADPH.

Accepted Answer

cyclic pho

Question 11

What is the role of accessory pigments in photosynthesis?

Accepted Answer

Chlorophyll a only absorbs visible light

Question 12

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

Accepted Answer

Question 13

The transfer of excitation energy from one molecule to one nearby through electromagnetic interactions is called ________________________________.

Accepted Answer

resonance

Question 14

Which of the following,when in the correct protein environment,is a very strong oxidant capable of extracting electrons from water?

Accepted Answer

A)  calcium 
B)  copper 
C)  manganese 
D)  magnesium 
E)  iron 
A)  calcium 
B)  copper 
C)  manganese 
D)  magnesium 
E)  iron

Question 15

In bacterial photosynthesis,how would the light energy be used if the reduced bacteriopheophytin (BPh- returned the electron to the P960+ cytochrome?

Accepted Answer

A)  It would follow a separate electron-transport chain. 
B)  It would be lost as heat. 
C)  It would stimulate the ejection of a second electron. 
D)  A proton would be pumped. 
E)  None of the answers is correct. 
A)  It would follow a separate electron-transport chain. 
B)  It would be lost as heat. 
C)  It would stimulate the ejection of a second electron. 
D)  A proton would be pumped. 
E)  None of the answers is correct.

Question 16

What ion is found at the center of the tetrapyrole in chlorophyll a?

Accepted Answer

A)  calcium 
B)  manganese 
C)  iron 
D)  copper 
E)  magnesium 
A)  calcium 
B)  manganese 
C)  iron 
D)  copper 
E)  magnesium

Question 17

What prosthetic group is associated with ferredoxin-NADP+ reductase?

Accepted Answer

A)  manganese center 
B)  plastoquinone 
C)  quinone A1 
D)  FAD 
E)  iron-sulfur center 
A)  manganese center 
B)  plastoquinone 
C)  quinone A1 
D)  FAD 
E)  iron-sulfur center

Question 18

What is the immediate source of the electron regained by the oxidized P960 in bacterial photosynthesis?

Accepted Answer

A)  plastoquinone 
B)  an NADPH molecule from a supporting pathway 
C)  complex III of the respiratory electron-transport chain 
D)  reduced cytochrome 
E)  None of the answers is correct. 
A)  plastoquinone 
B)  an NADPH molecule from a supporting pathway 
C)  complex III of the respiratory electron-transport chain 
D)  reduced cytochrome 
E)  None of the answers is correct.

Question 19

Chloroplasts are similar to mitochondria in that they

Accepted Answer

A)  have outer membranes that are highly permeable to small molecules and ions. 
B)  are double-membrane organelles. 
C)  contain electron transport chains. 
D)  contain a stroma. 
E)  move protons from outside to inside for ATP production. 
A)  have outer membranes that are highly permeable to small molecules and ions. 
B)  are double-membrane organelles. 
C)  contain electron transport chains. 
D)  contain a stroma. 
E)  move protons from outside to inside for ATP production.

Question 20

Write the overall reaction of photosystem II.

Accepted Answer

2 Q + 2 H₂O +light @#LAT-DLM& 2

Exam 19: The Light Reactions of Photosynthesis

The light-induced electron transfer in photosynthesis results in the transfer of ___________ into the thylakoid space.

Give the overall net equation as catalyzed by the "Z scheme" of photosynthesis.

Which of the following is/are light harvesting molecules?

In green plant photosynthesis,how many protons are transferred into the thylakoid lumen after absorption of four photons to PSII and four photons to PSI?

The inner membrane of a chloroplast surrounds a compartment called the _____________.

Describe the process of cyclic photophosphorylation.

What structure within the chloroplast resembles a flattened disk?

Light absorption induces electron transfer from P680 to

How do herbicides such as diuron or atrazine work?

In _______________,ATP is generated without the concomitant formation of NADPH.

What is the role of accessory pigments in photosynthesis?

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

The transfer of excitation energy from one molecule to one nearby through electromagnetic interactions is called ________________________________.

Which of the following,when in the correct protein environment,is a very strong oxidant capable of extracting electrons from water?

In bacterial photosynthesis,how would the light energy be used if the reduced bacteriopheophytin (BPh- returned the electron to the P960+ cytochrome?

What ion is found at the center of the tetrapyrole in chlorophyll a?

What prosthetic group is associated with ferredoxin-NADP+ reductase?

What is the immediate source of the electron regained by the oxidized P960 in bacterial photosynthesis?

Chloroplasts are similar to mitochondria in that they

Write the overall reaction of photosystem II.

Biochemistry: An Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Lipids and Cell Membranes

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

Oxidative Phosphorylation

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, repair, and Recombination

RNA Synthesis and Processing

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The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

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

In bacterial photosynthesis,how would the light energy be used if the reduced bacteriopheophytin (BPh^- returned the electron to the P960⁺ cytochrome?

What prosthetic group is associated with ferredoxin-NADP⁺ reductase?