23.) What molecule is produced during the CAC by an enzyme reacting succinyl-CoA with GDP and phosphate?
A) NAD+
B) citrate
C) oxaloacetate D) malate
E) succinate
F) A, C, & D
24.) In the CAC, what is the only enzyme that creates a product with the same molecular mass as its substrate?
A) succinate dehydrogenase B) isocitrate dehydrogenase C) aconitase
D) fumarase
E) none of the above
25.) Almost all of the O2 one consumes in breathing is converted to
A) CO2
B) acetyl-CoA C) ozone D) water
E) pyruvate
G) NADH
is getting reduced.
F) FAD
is serving as an oxidizing agent, and
B) succinate, succinate C) FADH2, fumarate D) FAD, FAD E) fumarate, FAD
26.) In the reaction, succinate + FAD fumarate + FADH2,
A) succinate, FAD
27.) Catabolic metabolism generally involves
A) reducing B) oxidizing
carbon-containing molecules.
C) hydrating D) joining E) singing to F) watering
E) NAD+
F) NADH
G) hugging
G) phosphate
28.) Sometimes cells allow protons to cross the mitochondria membrane avoiding ATP synthase. What does this accomplish/generate?
A) GTP
B) heat
C) electrons D) neutrons
29.) Which of the following is NOT involved in the electron transport chain?
A) fumarate
B) cytochrome c C) CO2
D) NADH
E) Fe-S cluster F) FAD
G) FMN
30.) If all carbon atoms of the substrate for pyruvate carboxylase are selectively 13C radiolabeled prior to the product's entry into the
citric acid cycle, how many radioactive 13C atoms would be present in the resultant oxaloacetate molecule that completes the cycle?
E) either B or C, cannot be determined which
A) 0
B) 1
C) 2
D) 3
31.) The enzyme in the reaction depicted below belongs to what class?
A) hydrolase
-20 POCH2
H
OH
HO
-H
OH
B) isomerase
C) transferase
D) lyase
E) oxidoreductase
B
H
-OPOCH
-20 POCH2
H
-2OPOCH2
H
OH
HỎ
OH
OH
HỎ
HỎ
H
HO
H
OPOCH20
с-он
H HỌ
H
он
он н
B
A) hexokinase B) triose phosphate isomerase C) phosphofructokinase-1
A)
B)
C)
32.) The mechanism of the above reaction is analogous to the mechanism of what other glycolytic enzyme?
33.) Which of the following structures represents galactose-6-phosphate?
D) aldolase
E) enolase
E)
D)
HO
HO
HO
OOH
OOH
HOOOH
OH
OH
OH
OH
OOH
OH
OH OH
OH
OH
OH
OH OH
P-O
O=P-O