Unformatted text preview: 21. Which of the following statements about the regulation of enzyme activity is (are)
a) a competitive inhibitor binds at the active site of the enzyme
b) an allosteric enzyme exhibits a sigmoidal rate of enzyme activity as a function
of substrate concentration ‘
c) a noncompetitive inhibitor binds to a site away from the active site d both a and c are correct
g all of the above are correct ' 22. Oxidation.
a) is the loss of one or more electrons
b) is usually an endergonic processmt, ,Qpﬂlsm'u olL occurs when a molecule loses hydrogen atoms - 1 0%“
both a and c are correct . ' o‘t‘ '
all of the above are correct ' ' M
c we r
23. Which of the folloWing statements about NAD+ is— tﬁare) TRUE? ‘ < /
a is a 1educing agent “m, 1 3,1 g . x
b) serves as a coenZyrne , )
is p1esent in mitochondria but not in cytoplasm Oil"?
d) both a and c are correct . ((5, out) e) all of the above are correct 24. Which statementCs) ab tthe Krebs cycle' 1s (are)
, a) produces C02 fa ﬁt? b) oxidation of pyruvateg crenerates acetyl coenzyme A which enters the Krebs cycle /
c) produces GTP ’ . d both a and c are correct
all of the above are correct 25. Which statement about glycolysis is FALSE? . '
a) results in the oxidation of glucose tvwgpw fﬂﬂ’ 9? requires oxygen
occurs in the cytoplasm d) generates ATP
e) leads to formation of pyruvate ,._..
26. Which statement about chemiosmosis 15w Hut
:1) occurs in mitochondria / b) ATP synthase couples movement of protons against their concentration gradient
to ATP synthesis protons are pumped across the membrane to create a proton gradient 1/
é, both a and c are correct _- ...
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- Summer '08