How much energy is contained in a mole of photons with a wavelength of 490 nm?
a. 127 kJ/mol
b. 2.4 × 105 kJ/mol
c. 244 kJ/mol
d. 2.4 × 10-4 J/mol
e. 4.1 × 10-19 J/mol - Answer c. 244 kJ/mol
How much energy is contained in a mole of photons with a wavelength of 490 nm?
a. 127 kJ/mol
b. 2.4 × 105 kJ/mol
c. 244 kJ/mol
d. 2.4 × 10-4 J/mol
e. 4.1 × 10-19 J/mol - Answer c. 244 kJ/mol
Which of the following describes the isomerization of citrate to isocitrate?
a. a major regulatory step for the citric acid cycle
b. converts a tertiary alcohol, which cannot easily be oxidized, to a secondary alcohol
that can be oxidized
c. an oxidation reaction
d. protects cells from the toxic effects of arsenite ions
e. the only unnecessary step of the citric acid cycle - Answer b. converts a tertiary
alcohol, which cannot easily be oxidized, to a secondary alcohol that can be oxidized
Why is the occasional production of the superoxide radical anion by complex IV of the
electron transport chain problematic?
a. It significantly reduces the efficiency of electron transport because of waste of
oxygen.
b. It is a feedback inhibitor of Complex I that inhibits the entire electron transport chain.
c. It is highly reactive and can damage nearby biomolecules.
,d. It is a potent uncoupler that prevents ATP synthesis - Answer c. . It is highly reactive
and can damage nearby biomolecules
What part of the chloroplast is the site of the energy-transducing reactions of
photosynthesis?
a.
stroma
b.
thylakoid membrane
c.
chloroplast inner membrane
d.
thylakoid lumen
e.
chloroplast outer membrane - Answer b.
thylakoid membrane
Which of the following transport systems is used in the inner mitochondrial membrane?
IMS = intermembrane space
a.
symport of ATP and Pi from IMS to matrix
b.
antiport of ADP from IMS to matrix and of ATP from matrix to IMS
c.
antiport of ADP from IMS to matrix and Pi from matrix to IMS
d.
, antiport of ATP from IMS to matrix and of ADP from matrix to IMS - Answer b.
antiport of ADP from IMS to matrix and of ATP from matrix to IMS
The cytochromes undergo which of the following oxidation reactions?
a.
Fe3+ → Fe2+
b.
Fe2+ → Fe3+
c.
Cu2+ → Cu1+
d.
Cu1+ → Cu2+
e.
Fe0 → Fe2+ - Answer b.
Fe2+ → Fe3+
Which of the following occurs when the catalytic subunit of ATP synthase is in the loose
state?
a.
ATP is released
b.
ATP is hydrolyzed
c.
ADP and Pi are released
d.
ADP and Pi are converted to ATP
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