Question 1

In cytochromes, the heme group plays a key role in acquiring and transferring electrons with a(n)  __________ transition.

Accepted Answer

A)   Mg0/Mg2+
B)   S0/S2-
C)   Cu+/C2+
D)   Fe2+/Fe3+
E)   none of the aboveF) B) and C)
G) A) and E)

Question 2

What membrane system are electron transport systems embedded in?

Accepted Answer

A)   mitochondrial inner membrane
B)   thylakoids
C)   the inner membrane of Gram-negative bacteria
D)   all of the above
E)   none of the aboveF) A) and B)
G) None of the above

Question 3

NADH has more reducing power than FADH2, therefore __________.

Accepted Answer

A)   oxidation of NADH will contribute to form a larger  Δ\DeltaΔ p and more ATP
B)   both FADH2 and NADH can be used by respiratory ETS, but FADH2 will produce a lower ATP yield
C)   the NADH + H+/NAD+ redox pair has a more negative E°' value than the FAD/FADH2 pair
D)   all of the above
E)   none of the above F) C) and D)
G) All of the above

Question 4

Electricity production by metal-reducing bacteria is a possibility. Describe how a metal with multiple redox states can be used to produce an electrical current.

Accepted Answer

Any metal with multiple redox states, su...

Question 5

Alkaliphiles maintain an inverted pH gradient in which:

Accepted Answer

A)   the pH in their immediate environment is lower than the cytoplasmic pH
B)   their immediate environment has a pH several units above that of the cytoplasm
C)   pH in the immediate environment is equal to that of the cytoplasm
D)   all of the above
E)   none of the aboveF) B) and C)
G) B) and D)

Question 6

Explain what kind of reaction bacteriorhodopsin performs and what it accomplishes for the cell. What is the name of the bacteriorhodopsin homologs, in what type of organisms were they identified, and what led to their discovery?

Accepted Answer

Bacteriorhodopsin absorbs light and goes...

Question 7

The anammox reaction consists of:

Accepted Answer

A)   reduction of sulfate by ammonia
B)   reduction of ammonium to form nitrite
C)   anaerobic ammonium oxidation by nitrite
D)   reduction of ammonium by oxygen
E)   the use of ammonium in amino acid biosynthesisF) B) and C)
G) C) and E)

Question 8

Some pathogenic bacteria use __________ to expel antibiotics from the cell.

Accepted Answer

A)   proton-driven efflux pumps
B)   sugar or amino acid inward carriers
C)   heme cofactors
D)   all of the above
E)   none of the aboveF) B) and E)
G) C) and D)

Question 9

Electron donors for anaerobic photosystem I in "green sulfur" bacteria include __________.

Accepted Answer

A)   H2S
B)   organic molecules
C)   Fe2+
D)   all of the above
E)   none of the aboveF) A) and C)
G) B) and D)

Question 10

Which of the following is NOT a terminal electron acceptor in anaerobic respirations?

Accepted Answer

A)   nitrate
B)   nitrite
C)   sulfate
D)   carbon dioxide
E)   hydrogen sulfideF) B) and D)
G) B) and E)

Exam 14: Respiration, Lithotrophy, and Photolysis

Alkaliphiles maintain an inverted pH gradient in which:

Correct Answer
verified

What membrane system are electron transport systems embedded in?

Correct Answer
verified

In cytochromes, the heme group plays a key role in acquiring and transferring electrons with a(n) __________ transition.

Correct Answer
verified

Electricity production by metal-reducing bacteria is a possibility. Describe how a metal with multiple redox states can be used to produce an electrical current.

Correct Answer
verified
Any metal with multiple redox states, su...
View Answer

Which of the following is NOT a terminal electron acceptor in anaerobic respirations?

Correct Answer
verified

NADH has more reducing power than FADH₂, therefore __________.

Correct Answer
verified

Some pathogenic bacteria use __________ to expel antibiotics from the cell.

Correct Answer
verified

Electron donors for anaerobic photosystem I in "green sulfur" bacteria include __________.

Correct Answer
verified

Explain what kind of reaction bacteriorhodopsin performs and what it accomplishes for the cell. What is the name of the bacteriorhodopsin homologs, in what type of organisms were they identified, and what led to their discovery?

Correct Answer
verified
Bacteriorhodopsin absorbs light and goes...
View Answer

The anammox reaction consists of:

Correct Answer
verified

Exam 14: Respiration, Lithotrophy, and Photolysis

Alkaliphiles maintain an inverted pH gradient in which:

Correct AnswerverifiedShow Answer

What membrane system are electron transport systems embedded in?

Correct AnswerverifiedShow Answer

In cytochromes, the heme group plays a key role in acquiring and transferring electrons with a(n) __________ transition.

Correct AnswerverifiedShow Answer

Electricity production by metal-reducing bacteria is a possibility. Describe how a metal with multiple redox states can be used to produce an electrical current.

Correct AnswerverifiedAny metal with multiple redox states, su...View AnswerShow Answer

Which of the following is NOT a terminal electron acceptor in anaerobic respirations?

Correct AnswerverifiedShow Answer

NADH has more reducing power than FADH2, therefore __________.

Correct AnswerverifiedShow Answer

Some pathogenic bacteria use __________ to expel antibiotics from the cell.

Correct AnswerverifiedShow Answer

Electron donors for anaerobic photosystem I in "green sulfur" bacteria include __________.

Correct AnswerverifiedShow Answer

Explain what kind of reaction bacteriorhodopsin performs and what it accomplishes for the cell. What is the name of the bacteriorhodopsin homologs, in what type of organisms were they identified, and what led to their discovery?

Correct AnswerverifiedBacteriorhodopsin absorbs light and goes...View AnswerShow Answer

The anammox reaction consists of:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Any metal with multiple redox states, su...
View Answer

Correct Answer
verified

NADH has more reducing power than FADH₂, therefore __________.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Bacteriorhodopsin absorbs light and goes...
View Answer

Correct Answer
verified