What is the terminal electron acceptor in aerobic organisms?
Which of the following describes the isomerization of citrate to isocitrate?
converts a tertiary alcohol, which cannot easily be oxidized, to a secondary alcohol that can be oxidized
How many cytochrome c molecules are oxidized by Complex IV for each molecule of oxygen that is
reduced
4
Which of the following occurs when the catalytic subunit of ATP synthase is in the loose state?
ADP and Pi bind
Why is the occasional production of the superoxide radical anion by complex IV of the electron transport
chain problematic?
It is highly reactive and can damage nearby biomolecules.
Which of the following can happen when a photosynthetic pigment absorbs light?
energy is lost as heat
b.
energy is given off as fluorescence
c.
exciton transfer to a neighboring pigment
d.
A bacterial ATP synthase has 9 c subunits whereas a chloroplast ATP synthase has 12 c subunits. Which
will have a higher P:O ratio?
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?
1.13 V
Which of the following is a source of reduced Coenzyme Q?
Complex I
b.
fatty acid breakdown
c.
Coenzyme Q is a _____ molecule that serves as a _____ electron carrier; cytochrome c is a _____
molecule that serves as a _____ electron carrier.
hydrophobic; 2; hydrophilic; 1
, How many protons are moved across the inner mitochondrial membrane by Complex III for each
electron pair transferred?
4
Which of the following transport systems is used in the inner mitochondrial membrane? IMS =
intermembrane space
antiport of ADP from IMS to matrix and of ATP from matrix to IMS
How much energy is contained in a mole of photons with a wavelength of 490 nm?
244 kJ/mol
The cytochromes undergo which of the following oxidation reactions?
Fe2+ → Fe3+
Which of the following is observed in the mechanism of citrate synthase?
an aspartic acid residue acts as a base, deprotonating acetyl-CoA
What part of the chloroplast is the site of the energy-transducing reactions of photosynthesis?
thylakoid membrane
In the malate-aspartate shuttle, _____ is reduced to _____ in the cytosol
oxaloacetate; malate
Complex III accepts electrons from _____ and transfers them to _____.
ubiquinol; cytochrome c
The compound dinitrophenol below was once introduced as a "diet pill". Its use was discontinued
because of fatal side effects. Why did people believe that the compound would be an effective diet aid?
The process of _____ allows electrons to be transferred between redox centers that are up to 1.4 nm
apart.
tunneling
From a metabolic standpoint, with a ∆G°′ of -16.7 kJ/mol, the reaction catalyzed by hexokinase is
considered to be _____.
irreversible
When a reaction is at equilibrium, the ∆G is equal to _____.
Which of the following describes the isomerization of citrate to isocitrate?
converts a tertiary alcohol, which cannot easily be oxidized, to a secondary alcohol that can be oxidized
How many cytochrome c molecules are oxidized by Complex IV for each molecule of oxygen that is
reduced
4
Which of the following occurs when the catalytic subunit of ATP synthase is in the loose state?
ADP and Pi bind
Why is the occasional production of the superoxide radical anion by complex IV of the electron transport
chain problematic?
It is highly reactive and can damage nearby biomolecules.
Which of the following can happen when a photosynthetic pigment absorbs light?
energy is lost as heat
b.
energy is given off as fluorescence
c.
exciton transfer to a neighboring pigment
d.
A bacterial ATP synthase has 9 c subunits whereas a chloroplast ATP synthase has 12 c subunits. Which
will have a higher P:O ratio?
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?
1.13 V
Which of the following is a source of reduced Coenzyme Q?
Complex I
b.
fatty acid breakdown
c.
Coenzyme Q is a _____ molecule that serves as a _____ electron carrier; cytochrome c is a _____
molecule that serves as a _____ electron carrier.
hydrophobic; 2; hydrophilic; 1
, How many protons are moved across the inner mitochondrial membrane by Complex III for each
electron pair transferred?
4
Which of the following transport systems is used in the inner mitochondrial membrane? IMS =
intermembrane space
antiport of ADP from IMS to matrix and of ATP from matrix to IMS
How much energy is contained in a mole of photons with a wavelength of 490 nm?
244 kJ/mol
The cytochromes undergo which of the following oxidation reactions?
Fe2+ → Fe3+
Which of the following is observed in the mechanism of citrate synthase?
an aspartic acid residue acts as a base, deprotonating acetyl-CoA
What part of the chloroplast is the site of the energy-transducing reactions of photosynthesis?
thylakoid membrane
In the malate-aspartate shuttle, _____ is reduced to _____ in the cytosol
oxaloacetate; malate
Complex III accepts electrons from _____ and transfers them to _____.
ubiquinol; cytochrome c
The compound dinitrophenol below was once introduced as a "diet pill". Its use was discontinued
because of fatal side effects. Why did people believe that the compound would be an effective diet aid?
The process of _____ allows electrons to be transferred between redox centers that are up to 1.4 nm
apart.
tunneling
From a metabolic standpoint, with a ∆G°′ of -16.7 kJ/mol, the reaction catalyzed by hexokinase is
considered to be _____.
irreversible
When a reaction is at equilibrium, the ∆G is equal to _____.
