Question 1

Light absorption induces electron transfer from P680 to:

Accepted Answer

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

Question 2

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

Accepted Answer

The answer of The light-induced electron transfer in photosynthesis results...

Question 3

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 above.

Question 4

Describe the experiment by Jagendorf that helped confirm Mitchell's chemiosmotic hypothesis.

Accepted Answer

Jagendorf exposed chloroplasts to low pH...

Question 5

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

Question 6

Write the overall reaction of photosystem II.

Accepted Answer

2Q + 2H2O + light → ...

Question 7

Write out the reaction for photosynthetic production of carbohydrates and oxygen.

Accepted Answer

CO2 + H2O ...

Question 8

In the overall stoichiometry of the light reactions, eight photons of light generate:

Accepted Answer

A)   four NADPH.
B)   four NADH.
C)   three ATP.
D)   B and C.
E)   A, B, and C.

Question 9

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

Accepted Answer

2 H2O + 2 ...

Question 10

One of the accessory pigments in plants is ____________.

Accepted Answer

A)  960 nm
B)  magnesium
C)  ATP synthase
D)  chloroplasts
E)  thylakoidsF) copperG) β-caroteneH) 680 nmI) FADJ) chlorophyll aK) ferredoxin bL) resonance energy transfer

Question 11

How do herbicides such as diuron or atrazine work?

Accepted Answer

These inhibitors block electro...

Question 12

Light absorbed by a chlorophyll a causes:

Accepted Answer

A)   an electron to move from the photon to the chlorophyll.
B)   an electron to move from a ground state to an excited state.
C)   an electron to move to a neighboring water molecule.
D)   an electron to move from chlorophyll to ADP.
E)   None of the above.

Question 13

Another name for the CF1-CF0 complex is ____________.

Accepted Answer

A)  960 nm
B)  magnesium
C)  ATP synthase
D)  chloroplasts
E)  thylakoidsF) copperG) β-caroteneH) 680 nmI) FADJ) chlorophyll aK) ferredoxin bL) resonance energy transfer

Question 14

____________: This electron carrier of photosystem I is an iron-sulfur protein.

Accepted Answer

A)  960 nm
B)  magnesium
C)  ATP synthase
D)  chloroplasts
E)  thylakoidsF) copperG) β-caroteneH) 680 nmI) FADJ) chlorophyll aK) ferredoxin bL) resonance energy transfer

Question 15

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

Accepted Answer

resonance ...

Question 16

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

Accepted Answer

cyclic pho...

Question 17

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.

Question 18

How is energy transferred from a photoreceptor molecule to photosystem II?

Accepted Answer

An electron in a photoreceptor...

Question 19

Why are chlorophylls good candidates for photoreceptors?

Accepted Answer

The conjugated network of sing...

Question 20

Chlorophyll a contains a(n)  ____________ ion in the center of the tetrapyrole.

Accepted Answer

A)  960 nm
B)  magnesium
C)  ATP synthase
D)  chloroplasts
E)  thylakoidsF) copperG) β-caroteneH) 680 nmI) FADJ) chlorophyll aK) ferredoxin bL) resonance energy transfer

Exam 22: The Light Reactions

How do herbicides such as diuron or atrazine work?

Correct AnswerverifiedThese inhibitors block electro...View AnswerShow Answer

Write out the reaction for photosynthetic production of carbohydrates and oxygen.

Correct AnswerverifiedCO2 + H2O ...View AnswerShow Answer

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

Correct Answerverifiedcyclic pho...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Write the overall reaction of photosystem II.

Correct Answerverified2Q + 2H2O + light → ...View AnswerShow Answer

Another name for the CF1-CF0 complex is ____________.

Correct AnswerverifiedShow Answer

____________: This electron carrier of photosystem I is an iron-sulfur protein.

Correct AnswerverifiedShow Answer

One of the accessory pigments in plants is ____________.

Correct AnswerverifiedShow Answer

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

Correct Answerverified2 H2O + 2 ...View AnswerShow Answer

Why are chlorophylls good candidates for photoreceptors?

Correct AnswerverifiedThe conjugated network of sing...View AnswerShow Answer

Describe the experiment by Jagendorf that helped confirm Mitchell's chemiosmotic hypothesis.

Correct AnswerverifiedJagendorf exposed chloroplasts to low pH...View AnswerShow Answer

How many chloroplasts does a typical plant cell have?

Correct AnswerverifiedShow Answer

How is energy transferred from a photoreceptor molecule to photosystem II?

Correct AnswerverifiedAn electron in a photoreceptor...View AnswerShow Answer

Chlorophyll a contains a(n) ____________ ion in the center of the tetrapyrole.

Correct AnswerverifiedShow Answer

In the overall stoichiometry of the light reactions, eight photons of light generate:

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedresonance ...View AnswerShow Answer

Light absorption induces electron transfer from P680 to:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Light absorbed by a chlorophyll a causes:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
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These inhibitors block electro...
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CO2 + H2O ...
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cyclic pho...
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Correct Answer
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2Q + 2H2O + light → ...
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Correct Answer
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Correct Answer
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Correct Answer
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2 H2O + 2 ...
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Correct Answer
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The conjugated network of sing...
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Jagendorf exposed chloroplasts to low pH...
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Correct Answer
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Correct Answer
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An electron in a photoreceptor...
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Correct Answer
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Correct Answer
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resonance ...
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Correct Answer
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Correct Answer
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Correct Answer
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