Practice Final 1 Answer Key
The enzyme catalyzes the reaction in both
directions (for opposing pathways).
The enzyme catalyzes the reaction in
only one direction, suggesting it’s highly
(Also, this is the pathway’s 1
Possible positive effectors: A, H;
negative effectors: F, G, C
5, 6, 7, 8
False; hexokinase is a transferase.
False; glucokinase is regulated by substrate
False; although it shows sigmoidal kinetics,
glucokinase is a monomeric protein.
An isozyme is a different enzyme that
catalyzes the same reaction
Glucosephosphate isomerase and
triosephosphate isomerase are not isozymes
because they catalyze different reactions.
a, b, d, e
a, b, d, j, m, n, o, p, r, s, t, z
lactic acid (lactate)
!ote that alcoholic fermentation would not
result in a sour taste.
Because the organism will use aerobic
catabolism instead of fermentation if O
encourages growth of
d, f, b, a, g, c, e
(The oxidant is the oxidizing agent, or
the compound that becomes reduced.)
ΔE°' = E°'
= +0.82 V –
(+0.05 V) = 0.77 V
ΔG°' = -nFΔE°' = -2(96.5 kJ/V·mol)(0.77 V)
= -148.6 kJ/mol
ΔG°' = -148.6 kJ/mol
≈ ΔG for e
transport from Compl. II → O
6 protons pumped: 6 x 20 kJ/mol
= 120 kJ per 6 mol protons pumped