12 terms

Lecture 07 - Oxidation/reduction - retry for exam (Homework)

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The aromatic form of NAD is NADH, not NAD+.
false
An example of a favorable biological reduction half reaction is ___ .

NAD+ and H+ and 2e- → NADH
NADH → NAD+ and H+ and 2e-
1/2 O2 and 2H+ and 2e- → H2O
H2O → 1/2 O2 and 2H+ and 2e-
1/2 O2 and 2H+ and 2e- → H2O
A favorable reaction has a negative ΔG or a negative ΔE.
false
Biological oxidation-reduction reactions always involve ___ .
transfer of electrons
A molecule which loses electrons is becoming ___ .
oxidized
During conversion of an aldehyde to COOH by the following reaction (aldehyde + 1/2 O2 → COOH), electrons are moving ____ .
from (C and H) to the new incoming O
For the reaction aldehyde → alcohol, the more oxidized state is the aldehyde.
true
A compound with a positive reduction potential is a better ___ than compounds with negative reduction potentials.
oxidant
The reductant is the molecule which is being reduced by something else.
false
For the reaction (1/2 O2 plus 2 H+ plus 2e- → H2O), oxygen itself is becoming ___ , and therefore is the ___ .
(becoming) reduced ; oxidant
A high reduction potential corresponds to a tendency to ___ .
acquire electrons and become reduced
The reduction potential of a compound is measured in ___ .
volts