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Multiple Choice
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1

What fraction of the enzymes in the Kreb cycle oxidizes their substrates?
A)6/8
B)5/8
C)4/8
D)3/8
E)1/8
2

Where are the Kreb cycle enzymes located?
A)Cytoplasma
B)Blood stream
C)Nucleus of cells
D)Golgi
E)Mitochondria
3

What does the Kreb cycle produce?
A)NAD+, ATP
B)NADH, FADH2, ATP, CO2
C)FAD, NAD+, CO2, ATP
D)Just ATP
E)Citric acid
4

The pairs of electrons and hydrogen ions removed from the citric acid cycle components are transferred to:
A)ATP
B)NAD+ and FAD
C)NADH and FADH2
D)ADP
E)CO2
5

Why doesn't nature just oxidize citric acid rather than converting it to isocitrate first?
A)There is no known reason
B)Because it is a tricarboxylic acid
C)Because isocitrate is an alpha hydroxy acid
D)Because it is saturated
E)Because it lacks an aldehyde group
6

Ignoring the coenzyme A, how many different carbons of the nine compounds in the Kreb cycle are chiral?
A)0
B)1
C)2
D)3
E)More than 3
7

The control of the Kreb cycle is mainly by:
A)Synthesis of enzymes
B)Breakdown of existing enzymes
C)A and B
D)Allosteric enzymes
E)Use of operons
8

The components of the electron transport scheme are in the:
A)Nucleus
B)Cytoplasma
C)Inner mitochondrial membrane
D)Intermembrane space in the mitochondria
E)Outer mitochondrial membrane





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