Question 1

In oxygenic photosynthesis, __________ is the electron donor, whereas in anaerobic photosynthesis it can be succinate or __________.

Accepted Answer

A)   H2S; S0
B)   O2; H2
C)   O2; H2O
D)   H2O; H2S
E)   all of the aboveF) A) and E)
G) A) and B)

Question 2

Describe Peter Mitchell's chemiosmotic model for coupling ETS with ATP synthesis.

Accepted Answer

In 1961, Peter Mitchell proposed that th...

Question 3

What is lithotrophy?

Accepted Answer

A)   breakdown of molecules using light energy
B)   oxidation of organic electron donors to CO2 and H2O
C)   photolysis of H2S or H2O coupled to CO2 fixation
D)   oxidation of inorganic electron donors such as Fe2+ using O2 or anaerobic electronic acceptors
E)   none of the aboveF) A) and E)
G) A) and D)

Question 4

How does photosystem I allow Chlorobium and other "green sulfur" bacteria to live near deep-sea vents?

Accepted Answer

Anaerobic photosystem I contains bacteri...

Question 5

How does the endosymbiont theory explain that the electron transfer system (ETS) in eukaryotes is located in the inner mitochondrial membrane?

Accepted Answer

The endosymbiont theory states that the ...

Question 6

What is the electron donor in anaerobic photosystem II?

Accepted Answer

A)   H2S
B)   bacteriochlorophyll
C)   quinol
D)   all of the above
E)   none of the aboveF) A) and E)
G) D) and E)

Question 7

Which of the following is NOT true of 2,4-dinitrophenol (DNP) ?

Accepted Answer

A)   It is an uncoupler.
B)   It can be used to measure  Δ\DeltaΔ pH.
C)   Unprotonated DNP can cross the membrane.
D)   Protonated DNP can cross the membrane.
E)   It dissipates the proton motive force. F) A) and B)
G) A) and C)

Question 8

The following is correct with respect to dehalorespiration:

Accepted Answer

A)   It is a type of hydrogenotrophy.
B)   Cl- can be removed from toxic compounds by dehalorespiration.
C)   Hydrogenotrophs can be used in bioremediation.
D)   All of the above.
E)   None of the above.F) None of the above
G) A) and D)

Question 9

Which of the following are components of reaction centers in the electron transport system?

Accepted Answer

A)   heme groups and flavin mononucleotide
B)   [2Fe-2S] and [4Fe-4S] iron-sulfur clusters
C)   conjugated double bonds and heteroaromatic rings
D)   all of the above
E)   none of the aboveF) C) and D)
G) B) and E)

Question 10

The Fo portion of Escherichia coli ATP synthase that rotates while translocating protons is:

Accepted Answer

A)   the  γ\gammaγ  drive shaft
B)   the a proton channel
C)   a ring of 12 c subunits
D)   an αβ\alpha\betaαβ -subunit
E)   none of the above F) A) and B)
G) B) and D)

Question 11

The chemiosmotic model does NOT explain synthesis of ATP in __________.

Accepted Answer

A)   the chloroplast thylakoid membrane
B)   the inner mitochondrial membrane
C)   substrate-level phosphorylations
D)   the purple bacteria thylakoids
E)   inner membranes of Gram-negative bacteriaF) A) and E)
G) B) and C)

Question 12

What are the units of E°'?

Accepted Answer

A)   kJ/mol
B)   kcal/mol
C)   mV
D)   ohm
E)   faradayF) A) and D)
G) B) and C)

Question 13

Which of the following can be used to measure  Δ\DeltaΔΨ\varPsiΨ ?

Accepted Answer

A)   lipid-soluble cations
B)   membrane-permeant weak acids
C)   oxidoreductases
D)   cytochromes
E)   uncoupling agents F) B) and C)
G) A) and C)

Question 14

A special kind of __________ flows among membrane-embedded proteins and cofactors, generating a(n)  __________.

Accepted Answer

A)   proton current; ion gradient
B)   electrical current; pH gradient
C)   electrical current; proton current
D)   all of the above
E)   none of the aboveF) A) and B)
G) A) and C)

Question 15

In purple bacteria, bacteriochlorophylls are supplemented by accessory pigments called:

Accepted Answer

A)   antenna complexes
B)   bacteriorhodopsin
C)   carotenoids
D)   chlorophylls
E)   thylakoidsF) All of the above
G) A) and D)

Question 16

In dehalorespiration of chlorinated pollutants, the chlorine is removed and replaced by:

Accepted Answer

A)   hydrogen
B)   oxygen
C)   nitrogen
D)   sulfur
E)   ammoniaF) A) and C)
G) A) and B)

Question 17

Anaerobic corrosion of steel is accelerated by __________.

Accepted Answer

A)   nitrifiers
B)   sulfur-reducing bacteria
C)   methanogenic archaea
D)   all of the above
E)   none of the aboveF) B) and E)
G) A) and B)

Question 18

Which organism oxidizes copper and iron sulfides?

Accepted Answer

A)   Geobacter metallireducens
B)   Sulfurospirillum barnesii
C)   Haloferax volcanii
D)   Thiobacillus ferrooxidans
E)   Bacillus subtilisF) A) and C)
G) A) and E)

Question 19

Sulfolobus species produce __________; as a result, their immediate environment has a pH as low as __________.

Accepted Answer

A)   H2SO4; 2
B)   H3PO4; 0
C)   HCl; 1
D)   CH3COO-; 4
E)   none of the aboveF) A) and D)
G) B) and C)

Question 20

How has the Geobacter metallireducens redox energy been harnessed in the production of electricity?

Accepted Answer

Geobacter cells can form a biofilm on a ...

Exam 14: Respiration, Lithotrophy, and Photolysis

What are the units of E°'?

Correct AnswerverifiedShow Answer

Which of the following is NOT true of 2,4-dinitrophenol (DNP) ?

Correct AnswerverifiedShow Answer

Which of the following are components of reaction centers in the electron transport system?

Correct AnswerverifiedShow Answer

In oxygenic photosynthesis, __________ is the electron donor, whereas in anaerobic photosynthesis it can be succinate or __________.

Correct AnswerverifiedShow Answer

How does the endosymbiont theory explain that the electron transfer system (ETS) in eukaryotes is located in the inner mitochondrial membrane?

Correct AnswerverifiedThe endosymbiont theory states that the ...View AnswerShow Answer

What is the electron donor in anaerobic photosystem II?

Correct AnswerverifiedShow Answer

Sulfolobus species produce __________; as a result, their immediate environment has a pH as low as __________.

Correct AnswerverifiedShow Answer

A special kind of __________ flows among membrane-embedded proteins and cofactors, generating a(n) __________.

Correct AnswerverifiedShow Answer

How does photosystem I allow Chlorobium and other "green sulfur" bacteria to live near deep-sea vents?

Correct AnswerverifiedAnaerobic photosystem I contains bacteri...View AnswerShow Answer

In dehalorespiration of chlorinated pollutants, the chlorine is removed and replaced by:

Correct AnswerverifiedShow Answer

What is lithotrophy?

Correct AnswerverifiedShow Answer

Anaerobic corrosion of steel is accelerated by __________.

Correct AnswerverifiedShow Answer

Which of the following can be used to measure Δ\DeltaΔΨ\varPsiΨ ?

Correct AnswerverifiedShow Answer

In purple bacteria, bacteriochlorophylls are supplemented by accessory pigments called:

Correct AnswerverifiedShow Answer

How has the Geobacter metallireducens redox energy been harnessed in the production of electricity?

Correct AnswerverifiedGeobacter cells can form a biofilm on a ...View AnswerShow Answer

The following is correct with respect to dehalorespiration:

Correct AnswerverifiedShow Answer

The chemiosmotic model does NOT explain synthesis of ATP in __________.

Correct AnswerverifiedShow Answer

Which organism oxidizes copper and iron sulfides?

Correct AnswerverifiedShow Answer

The Fo portion of Escherichia coli ATP synthase that rotates while translocating protons is:

Correct AnswerverifiedShow Answer

Describe Peter Mitchell's chemiosmotic model for coupling ETS with ATP synthesis.

Correct AnswerverifiedIn 1961, Peter Mitchell proposed that th...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In oxygenic photosynthesis, is the electron donor, whereas in anaerobic photosynthesis it can be succinate or .

Correct Answer
verified

Correct Answer
verified
The endosymbiont theory states that the ...
View Answer

Correct Answer
verified

Sulfolobus species produce ; as a result, their immediate environment has a pH as low as .

Correct Answer
verified

A special kind of flows among membrane-embedded proteins and cofactors, generating a(n) .

Correct Answer
verified

Correct Answer
verified
Anaerobic photosystem I contains bacteri...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which of the following can be used to measure $\Delta$ $\varPsi$ ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Geobacter cells can form a biofilm on a ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The F_o portion of Escherichia coli ATP synthase that rotates while translocating protons is:

Correct Answer
verified

Correct Answer
verified
In 1961, Peter Mitchell proposed that th...
View Answer