Question 1

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

Accepted Answer

cyclic pho...

Question 2

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

Question 3

______________________ is the term for a bacteriochlorophyll that has two protons instead of a magnesium ion at its center.

Accepted Answer

The answer of ______________________ is the term for a bacteriochlorophyll...

Question 4

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.

Question 5

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

Accepted Answer

2 H₂O + 2 N...

Question 6

Humans do not produce energy by photosynthesis. Why, then, is this process critical to our survival?

Accepted Answer

The products of phot...

Question 7

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

Accepted Answer

resonance ...

Question 8

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

Accepted Answer

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

Question 9

How is it possible to make ATP without generating NADPH?

Accepted Answer

In cyclic photophosphorylation, the elec...

Question 10

In bacterial photosynthesis, what is one way in which the proton gradient is created?

Accepted Answer

A)   reduction of a quinone that causes uptake of two protons from the cytoplasm
B)   the reduction of NADPH
C)   the transfer of protons from NADH across the membrane via a shuttle system
D)   the conversion of H2O to H+
E)   None of the answers is correct.

Question 11

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

Question 12

After P960 absorbs light, what are the next few steps in bacterial photosynthesis?

Accepted Answer

Excitation of the P960 leads to ejection...

Question 13

How are thylakoid membranes unique?

Accepted Answer

A)   They contain only 10% phospholipids.
B)   They contain 40% galactolipids.
C)   They have equivalent amounts of protein and lipid.
D)   They contain only 10% phospholipids, and they have equivalent amounts of protein and lipid.
E)   All the answers are correct.

Question 14

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

Question 15

What organelle is the site of photosynthesis?

Accepted Answer

A)   chloroplast
B)   mitochondria
C)   vacuole
D)   endoplasmic reticulum
E)   None of the answers is correct.

Question 16

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.

Question 17

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.

Question 18

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

Question 19

The pathway of electron flow from H2O to NADP+ in photosynthesis is referred to as

Accepted Answer

A)   cooperative special pairs.
B)   photorespiration.
C)   the Z scheme of photosynthesis.
D)   photophosphorylation.
E)   None of the answers is correct.

Question 20

P680 is the pigment reaction center for ____________________.

Accepted Answer

The answer of P680 is the pigment reaction center for...

Exam 19: The Light Reactions of Photosynthesis

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

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

How is it possible to make ATP without generating NADPH?

Correct AnswerverifiedIn cyclic photophosphorylation, the elec...View AnswerShow Answer

______________________ is the term for a bacteriochlorophyll that has two protons instead of a magnesium ion at its center.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The pathway of electron flow from H2O to NADP+ in photosynthesis is referred to as

Correct AnswerverifiedShow Answer

Humans do not produce energy by photosynthesis. Why, then, is this process critical to our survival?

Correct AnswerverifiedThe products of phot...View AnswerShow Answer

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

Correct Answerverifiedresonance ...View AnswerShow Answer

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

Correct Answerverified2 H2O + 2 N...View AnswerShow Answer

What structure within the chloroplast resembles a flattened disk?

Correct AnswerverifiedShow Answer

How are thylakoid membranes unique?

Correct AnswerverifiedShow Answer

In bacterial photosynthesis, what is one way in which the proton gradient is created?

Correct AnswerverifiedShow Answer

What organelle is the site of photosynthesis?

Correct AnswerverifiedShow Answer

After P960 absorbs light, what are the next few steps in bacterial photosynthesis?

Correct AnswerverifiedExcitation of the P960 leads to ejection...View AnswerShow Answer

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

Correct Answerverifiedcyclic pho...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

P680 is the pigment reaction center for ____________________.

Correct AnswerverifiedShow Answer

Chloroplasts are similar to mitochondria in that they

Correct AnswerverifiedShow Answer

Which of the following is/are light harvesting molecules?

Correct AnswerverifiedShow Answer

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

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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In cyclic photophosphorylation, the elec...
View Answer

Correct Answer
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Correct Answer
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The pathway of electron flow from H₂O to NADP⁺ in photosynthesis is referred to as

Correct Answer
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Correct Answer
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The products of phot...
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resonance ...
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Correct Answer
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2 H₂O + 2 N...
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Excitation of the P960 leads to ejection...
View Answer

Correct Answer
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cyclic pho...
View Answer

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

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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