Take this Electron Transport Chain (ETC) practice exam questions with answers quiz and evaluate for yourself. An ETC is a series of four protein complexes (and/or other molecules) that couple redox reactions and transfer electrons from electron donors to electron acceptors. Here, in this quiz, you'll be asked questions related to the citric acid cycle, enzymes involved in this, and the products formed during the cycle. If you know about these processes, why don't you play the quiz? Good luck!
It is endergonic
It is exergonic
It is endothermic
It is exothermic
ΔG = ΔT - S*ΔH
ΔG = ΔH + T*ΔS
ΔG = ΔH - T*ΔS
None of the above
Endergonic
Exergonic
Endothermic
Not enough information
Supply activation energy, making the reaction more likely to occur
Are reactants in endergonic reactions
Stabilize the transition state
Are a type of catalytic substrate
The enzyme is withdrawn into the cytoplasm
A protein binds to another active site, affecting the first active site
A molecule binds to and blocks the active site
None of the above
Active sites
Reacting sites
Losing sites
None of the above
1
2
3
4
ATP and H2O
ATP and CO2
NADH and CO2
NADH and H2O
Citrate→isocitrate
Isocitrate→α-ketoglutarate
α-ketoglutarate→succinyl CoA
Succinyl CoA→succinate
Succinate→fumarate
Fumarate→malate
Malate→oxaloacetate
ADP to ATP
Releases H2O
FAD to FADH2
GDP to GTP
1
2
3
4
Cytoplasm
Mitochondria
Golgi apparatus
GLUT receptors
GTP
H+
NADH
O2
Against the concentration gradient: from the inner membrane space to the matrix
Down the concentration gradient: from the inner membrane space to the matrix
Against the concentration gradient: from the matrix to the inner membrane space
Down the concentration gradient: from the matrix to the inner membrane space
Complex I
Complex II
Complex III
Complex IV
1
2
3
4
True
False
1
2
3
4
8
10
11
12
Flavin
Ubiquinone
Iron sulfur cluster
Cytochrome C
Complex II, ubiquinone, complex III, complex IV
Complex I, ubiquinone, complex III, complex IV
Complex I, complex II, cytochrome C, complex IV
Complex II, ubiquinone, cytochrome C, complex IV
3
2.5
2
1.5
It occurs in the presence of oxygen.
One of the products can be lactic acid
CO2 can be released
It converts NADH to NAD+
Their nitrogen is removed, converting them into components of the CAC.
Their carbon is removed, releasing energy.
They are oxidized by pyruvate and join the CAC.
Amino acids are products of anabolic reactions, never part of the catabolic pathway.
NADH
CO2
FADH2
H2O