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BCHM 307 homework review Test PREP WITH COMPLETE SOLUTION
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BCHM 307 homework review Test PREPWITH COMPLETE SOLUTION
In the malate-aspartate shuttle, _____ is reduced to _____ in the cytosol
A
aspartate; oxaloacetate
B
oxaloacetate; malate
c.
aspartate; malate
d.
malate; aspartate
e.
malate; oxaloacetate - =oxaloacetate; malate
How many cytochrome c molecules are oxidized by Complex IV for each molecule of oxygen
that is reduced?
a. 1
b. 2
c. it depends on the efficiency of the electron transfer in Complex IV
d. 4
e. 3 - =4
Which of the following can happen when a photosynthetic pigment absorbs light?
a. energy is lost as heat
b. energy is given off as fluorescence
c. exciton transfer to a neighboring pigment
, d. photooxidation of the pigment
e. all of the above - =e. all of the above
Which of the following is a source of reduced Coenzyme Q?
a. Complex I
b. fatty acid breakdown
c. succinate dehydrogenase
d. all of the above - =d. all of the above
Which of the following is observed in the mechanism of citrate synthase?
a.removal of the CoA is accomplished by transfer to a serine residue, then hydrolysis
b. an aspartic acid residue acts as a base, deprotonating acetyl-CoA
c. all of the above
d. a histidine residue protonates the carboxyl group of oxaloacetate
e. a histidine residue acts as a base, deprotonating oxaloacetate - =b. an aspartic acid residue
acts as a base, deprotonating acetyl-CoA
Coenzyme Q is a _____ molecule that serves as a _____ electron carrier; cytochrome c is a
_____ molecule that serves as a _____ electron carrier.
a. hydrophobic; 2; hydrophilic; 1
b. hydrophobic; 2; hydrophilic; 2
c. hydrophobic; 4; hydrophilic; 1
d. hydrophilic; 2; hydrophobic; 1
e. hydrophilic; 2; hydrophobic; 2 - =a. hydrophobic; 2; hydrophilic; 1
If the reduction potential for NAD+ is -0.315 V and the reduction potential for oxygen is 0.815 V,
what is the potential for the oxidation of NADH by oxygen?
a. 0.50 V
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