Micro Chapter 13-15 Quiz
In oxygenic phototrophy, the initial electron donor is:
Water
Glycolysis has a net yield of_____ molecules of ATP
2
In bacteria, aerobic respiration can yield a maximum of ________ Molecules of ATP/GTP from every glucose molecule.
32
In aerobic respiration, what is used for cellular work?
ATP
What is an input of glycolysis
ATP
Rhodopsin-based phototrophy uses:
ATPase
What is an output of aerobic respiration?
CO2
Oxidized/ reduced Acceptor/donor CO2 (I)/glucose(J) = -0.43 V H+(O)/H2(P)= -0.42 V NAD+(M)/NADH(N)= -0.32 V S0(U)/H2S(V)= -0.27 V CO2(K)/CH4(L) = -0.24 V; SO42-(E)/S0(F) = -0.20 V; pyruvate(S)/lactate(T) = -0.19 V CoQ (A)/CoQH2 (B) = +0.10 V NO2- (G)/NH4+ (H) = +0.44 V NO3-(W)/N2(X)= +0.74 V Fe3+ (C)/Fe2+ (D) = +0.771 V O2 (Q)/H2O(R) = +0.815 V The list of redox couples provided above only lists two carriers, which cannot serve as initial electron donors or final electron acceptors. But if they were arranged in order for energetically favorable electron transport the first carrier would be___and the second carrier would be____ . (note: either oxidized or reduced form is fine)
Carriers arranged in order for energetically favorable M or N and A or B
Oxidized/ reduced Acceptor/donor CO2 (I)/glucose(J) = -0.43 V H+(O)/H2(P)= -0.42 V NAD+(M)/NADH(N)= -0.32 V S0(U)/H2S(V)= -0.27 V CO2(K)/CH4(L) = -0.24 V; SO42-(E)/S0(F) = -0.20 V; pyruvate(S)/lactate(T) = -0.19 V CoQ (A)/CoQH2 (B) = +0.10 V NO2- (G)/NH4+ (H) = +0.44 V NO3-(W)/N2(X)= +0.74 V Fe3+ (C)/Fe2+ (D) = +0.771 V O2 (Q)/H2O(R) = +0.815 V If a bacterium were a chemolithoautotrophic iron oxidizer, the best initial electron donor would be___ , while the best final electron acceptor would be___.
Donor D Acceptor Q
Oxidized/ reduced Acceptor/donor CO2 (I)/glucose(J) = -0.43 V H+(O)/H2(P)= -0.42 V NAD+(M)/NADH(N)= -0.32 V S0(U)/H2S(V)= -0.27 V CO2(K)/CH4(L) = -0.24 V; SO42-(E)/S0(F) = -0.20 V; pyruvate(S)/lactate(T) = -0.19 V CoQ (A)/CoQH2 (B) = +0.10 V NO2- (G)/NH4+ (H) = +0.44 V NO3-(W)/N2(X)= +0.74 V Fe3+ (C)/Fe2+ (D) = +0.771 V O2 (Q)/H2O(R) = +0.815 V If members of the redox couples above were used to set up the most energetically favorable chemical reaction, the initial electron donor should be____and the final electron acceptor should be____ .
Donor J Acceptor Q
Oxidized/ reduced Acceptor/donor CO2 (I)/glucose(J) = -0.43 V H+(O)/H2(P)= -0.42 V NAD+(M)/NADH(N)= -0.32 V S0(U)/H2S(V)= -0.27 V CO2(K)/CH4(L) = -0.24 V; SO42-(E)/S0(F) = -0.20 V; pyruvate(S)/lactate(T) = -0.19 V CoQ (A)/CoQH2 (B) = +0.10 V NO2- (G)/NH4+ (H) = +0.44 V NO3-(W)/N2(X)= +0.74 V Fe3+ (C)/Fe2+ (D) = +0.771 V O2 (Q)/H2O(R) = +0.815 V The best initial electron donor for an organism performing fermentation would be___, while the best final electron acceptor would be____ . would be formed from the reduction of the electron acceptor?
Donor J Acceptor S product from acceptor T
Oxidized/ reduced Acceptor/donor CO2 (I)/glucose(J) = -0.43 V H+(O)/H2(P)= -0.42 V NAD+(M)/NADH(N)= -0.32 V S0(U)/H2S(V)= -0.27 V CO2(K)/CH4(L) = -0.24 V; SO42-(E)/S0(F) = -0.20 V; pyruvate(S)/lactate(T) = -0.19 V CoQ (A)/CoQH2 (B) = +0.10 V NO2- (G)/NH4+ (H) = +0.44 V NO3-(W)/N2(X)= +0.74 V Fe3+ (C)/Fe2+ (D) = +0.771 V O2 (Q)/H2O(R) = +0.815 V. If a bacterium were an anaerobic chemolithoautotroph, the best initial electron donor would be___ , while the best final electron acceptor would be___.
Donor P Acceptor C
Oxidized/ reduced Acceptor/donor CO2 (I)/glucose(J) = -0.43 V H+(O)/H2(P)= -0.42 V NAD+(M)/NADH(N)= -0.32 V S0(U)/H2S(V)= -0.27 V CO2(K)/CH4(L) = -0.24 V; SO42-(E)/S0(F) = -0.20 V; pyruvate(S)/lactate(T) = -0.19 V CoQ (A)/CoQH2 (B) = +0.10 V NO2- (G)/NH4+ (H) = +0.44 V NO3-(W)/N2(X)= +0.74 V Fe3+ (C)/Fe2+ (D) = +0.771 V O2 (Q)/H2O(R) = +0.815 V If a bacterium were a iron-reducing sulfurous-oxidizer, the best initial electron donor would be ___, while the best final electron acceptor would be___ .
Donor V Acceptor C
Given these redox couples, what would be the best initial electron donor for a microbe using anaerobic chemolithotrophy? CO2/glucose = -0.43 S0/H2S = -0.28 CO2/methanol = -0.38
H2S This is the only donor listed that is inorganic and it most be an inorganic donor for anaerobic chemolithotrophy
What is an output of glycolysis?
NADH
What is a likely initial electron donor for a chemolithotroph?
NH3
Using the following redox couples, what is the best final electron acceptor for a microbe using anaerobic respiration, if it can only reduce sulfur compounds? S0/H2S = -0.28V fumarate2-/succinate2- = +0.03V SO42-/S0 = -0.20V
SO42-
What characteristic applies to the purple photosynthetic bacteria?
They use a cyclic form of phototrophy for ATP generation.
For cyanobacterium, what happens to the electrons in the end? They are:
used to fix CO2.
Oxidized/ reduced Acceptor/donor CO2 (I)/glucose(J) = -0.43 V H+(O)/H2(P)= -0.42 V NAD+(M)/NADH(N)= -0.32 V S0(U)/H2S(V)= -0.27 V CO2(K)/CH4(L) = -0.24 V; SO42-(E)/S0(F) = -0.20 V; pyruvate(S)/lactate(T) = -0.19 V CoQ (A)/CoQH2 (B) = +0.10 V NO2- (G)/NH4+ (H) = +0.44 V NO3-(W)/N2(X)= +0.74 V Fe3+ (C)/Fe2+ (D) = +0.771 V O2 (Q)/H2O(R) = +0.815 V Let's assume that you discovered a bacterium that can use a number of possible electron acceptors, including ones not listed here, but is restricted to an electron donor from the electron couples listed above. What would be the worst possible initial electron donor it could use?
Worst electron Donor R
Oxidized/ reduced Acceptor/donor CO2 (I)/glucose(J) = -0.43 V H+(O)/H2(P)= -0.42 V NAD+(M)/NADH(N)= -0.32 V S0(U)/H2S(V)= -0.27 V CO2(K)/CH4(L) = -0.24 V; SO42-(E)/S0(F) = -0.20 V; pyruvate(S)/lactate(T) = -0.19 V CoQ (A)/CoQH2 (B) = +0.10 V NO2- (G)/NH4+ (H) = +0.44 V NO3-(W)/N2(X)= +0.74 V Fe3+ (C)/Fe2+ (D) = +0.771 V O2 (Q)/H2O(R) = +0.815 V Now let's assume that you discovered a bacterium that can use a number of possible electron donors, including ones not listed here, but is restricted to an electron acceptor from the electron couples listed above. What would be the worst possible final electron acceptor it could use?
Worst electron acceptor I or K
The rhodopsin-based phototrophy performed by Halobacterium utilizes:
a light-driven proton pump.
Oxygenic phototrophy uses:
all of the other answers photophosphorylation an external electron donor two electron transport chains ATPase
What do aerobic respiration & anaerobic respiration have in common?
all the answers are correct TCA cycle an electron transport chain glycolysis
Denitrifying bacteria are performing:
anaerobic respiration
In anammox, a nitrogen compound is being used as a(n)
both electron acceptor and electron donor
Mixotroph is another name for:
chemolithoheterotrophs
Substrate-level phosphorylation refers to the:
direct transfer of Pi to ADP
In aerobic respiration, glucose is a(n):
electron donor
In nitrification, a nitrogen compound is being used as a(n)
electron donor
For a bacterium using anaerobic respiration, what is the initial electron donor?
glucose
What is an input of aerobic respiration?
glucose
What do aerobic respiration & fermentation have in common? The use of:
glycolysis
Cyanobacteria fix nitrogen in specialized structures known as:
heterocysts
What do anaerobic respiration and chemolithotrophy have in common? They both use:
oxidative phosphorylation
What process is used by an aerobic chemolithotroph?
oxidative phosphorylation
What process is used by an anaerobic chemolithotroph?
oxidative phosphorylation
In nitrification, NO3- is a(n):
product
You find a phototrophic bacterium that has bacteriochlorophyll, uses anoxygenic phototrophy to make ATP, and the reverse electron flow to reduce NADP. What group would it belong to?
purple phototrophic bacteria
What process is used by a bacterium using fermentation?
substrate-level phosphorylation
