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Multiple Choice
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1

Which of the following vitamins would you expect to be involved in the following reaction:
CH3C(O)S-CoA + ATP + CO2® ADP + Pi + -O2CCH2C(O)S-CoA
A)Biotin
B)Thiamin
C)Niacin
D)Riboflavin
E)Vitamin C
2

Which of the following is involved in the oxidation of protein bound amino acids which are then involved in cross linking of connective tissue?
A)Biotin
B)Thiamin
C)Niacin
D)Riboflavin
E)Vitamin C
3

Most enzymatic reactions have the fastest rates at:
A)Low pH's
B)High pH's
C)pH's near 7
D)B and C
E)pH is not a factor in most enzymatic reactions
4

Most enzymatic reactions have the fastest rates at:
A)Temperatures > 50°C
B)Temperatures < 20°C
C)Temperatures > 20 and < 50°C
D)Temperatures < 20 and > 50°C
E)Temperature does not affect enzymatic reactions
5

Metabolic pathways are often represented by letters separated by arrows. What do the arrows and letters represent, respectively?
A)Mechanisms and enzyme bound intermediates
B)Equilibrium positions and compounds
C)Equilibrium positions and mechanisms
D)Compounds and enzymes
E)Enzymes and compounds
6

Sulfa drugs function by:
A)Preventing bacteria from obtaining nutrients
B)Preventing a virus from obtaining nucleotides
C)Preventing the formation of collagen
D)Mimicking para-amino benzoic acid
E)None of these
7

Allosteric enzymes are:
A)Regulated by covalently adding small molecules
B)Regulated by pH changes
C)Regulated by hydrolysis
D)Regulated by phosphorylation
E)None of these
8

What is transferred in a kinase reaction?
A)Phosphate
B)Phosphoryl
C)Pyrophosphate
D)Phosphorous atom
E)2 electrons
9

What vitamin is associated with the enzyme lysine decarboxylase, which converts lysine to CO2 and 1,5-diaminopentane?
A)Pyridoxine
B)Pantothenic acid
C)B12
D)Biotin
E)Thiamin
10

The enzyme pyruvate decarboxylase converts CHC(O)CO2H into CO2 and ethanal. What vitamin is associated with pyruvate decarboxylase?
A)Pyridoxine
B)Pantothenic acid
C)B12
D)Biotin
E)Thiamin





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