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BIOCHEMISTRY 301 – EXAM3 MCQs EXAM QUESTIONS AND ANSWERS

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BIOCHEMISTRY 301 – EXAM3 MCQs EXAM QUESTIONS AND ANSWERS....

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BIOCHEMISTRY 301
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November 24, 2024
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"Mad Hatters" were mad because of what? - ANSWER heavy metal poisoning

Using the "E1, E2, E3" terminology for Pyruvate DH Complex - TPP is found
at the active site of which enzyme? - ANSWER E1

If carbon one (the carboxyl carbon) of Pyruvate is labelled with carbon-14, and
then the Pyruvate is put through one "turn" of the Citric Acid Cycle, which
carbon(s) of Oxaloacetate will be labelled?

Pick as many choices as are necessary. - ANSWER none, it is lost as CO2

"Substrate Level Phosphorylation" means making triphosphates (ATP or GTP)
just using enzymes, and not using electron transport. The only example n the
Citric Acid Cycle is catalyzed by: - ANSWER Succinyl CoA Synthetase

An important factor in the linkage between electron transport and proton
pumping is the fact that one molecule can easily move hydrogen across the
mitochondrial membrane - namely - ANSWER Ubiquinone

"Sugar can make you fat, but fat can't make you sweet" is true of humans, but
not of organisms that have what? - ANSWER the Glyoxalate cycle

Cyanide blocks what? - ANSWER Complex IV

The simplest Iron-Sulfur clusters just require a protein with a cavity lined with
residues of which amino acid residue? - ANSWER cys

Complex IV delivers electrons from cytochrome c to O2 one at a time,
producing peroxide and superoxide in the process - ANSWER False

The Pentose Phosphate Pathway is most active in which tissue? - ANSWER
adipose

, The "Thirty Carbon Reaction" refers to conversion of 6 Ribose-5-P to 5
Fructose-6-P and the reverse of that, with no decarboxylations. This conversion
would utilize - ANSWER only the non-oxidative branch of PPP

Most tissues in the human body use the Glycerol Phosphate Shuttle. What
organs use the Malate Aspartate Shuttle instead? - ANSWER Heart, liver

If Fructose-6-P and Erythrose-4-P were reacted with Transketolase and TPP in
the lab, what sugars would result? - ANSWER Erythrose-4-P and Fructose-6-P

The mechanism of Transaldolase is about the same as Aldolase. But the
mechanism of Transketolase involves covalent attachment of substrate to -
ANSWER Thiamine Pyrophosphate

Pamaquine-Induced Hemolytic Anemia is caused by a deficiency of -
ANSWER G6PDH

In Type 1 Glycogen Storage Disease (von Gierke) the only glucose molecules
that can leave the liver cells and enter the blood do so because of what enzyme?
- ANSWER alpha 1,6 Glucosidase

In the mitochondrial electron transport chain, what is the immediate oxidizer of
Cytochrome c1? - ANSWER Cytochrome c

During glycogen synthesis, the "Branching" enzyme moves how many glucose
residues from the main chain to form a branch? - ANSWER 7

During beta oxidation of fatty acids in the mitochondrial matrix, 3-ketoacyl
CoA reacts with Coa and what enzyme? - ANSWER Ketothiolase

The enzyme responsible for the remodeling of Glycogen during synthesis is
called - ANSWER Branching enzyme

Glycogen Phosphorylase can be activated allosterically by - ANSWER AMP

The reactants for Glycogen synthesis using Glycogen Synthase are Glycogen
and - ANSWER UDP-Glucose

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