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Multiple Choice
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1

Most enzymes are essentially:
A)Carbohydrates
B)Proteins
C)Lipids
D)Nucleic acids
E)Vitamins
2

What can be deduced about the reaction catalyzed by the enzyme lysine decarboxylase?
A)The enzyme adds a CO2 group to lysine
B)The enzyme removes a CO2 group from lysine
C)The enzyme oxidizes lysine
D)The enzyme reduces lysine
E)The enzyme hydrolyzes lysine
3

An enzyme that converts a dipeptide into amino acids can be called a:
A)Hydrolase
B)Dehydrogenase
C)Decarboxylase
D)Dehydratase
E)Oxidase
4

An enzyme that converts the amino acid serine to phosphoserine can be called a:
A)Serinase
B)Serine decarboxylase
C)Serine dehydrogenase
D)Serine kinase
E)Serine phosphatase
5

Enzymes typically:
A)Increase the activation energy of a reaction.
B)Typically decrease the activation energy of a reaction.
C)Activation energies have nothing to do with enzymes.
D)Activation energies depend only on the temperature.
6

Transition states can be which of the following to the substrate?
A)Molecular geometry distortion
B)Bond length compression
C)Bond length lengthened
D)Positioning of atoms
E)All of the above
7

Nicotinamide adenine dinucleotide is involved in the interconversion of acetaldehyde (ethanal) and ethanol. Which of the following is a correct reaction?
A)Both ethanol and NAD+ are being reduced
B)Both ethanol and NAD+ are being oxidized
C)Ethanol is being oxidized and NADH is being reduced
D)Ethanal is being oxidized and NADH is being reduced
E)Ethanol is being oxidized and NAD+ is being reduced
8

Reduced nicotinamide adenine dinucleotide contains which vitamin?
A)Biotin
B)Thiamin
C)Niacin
D)Riboflavin
E)Vitamin C
9

FAD/FADH2 contains which of the following vitamins?
A)Biotin
B)Thiamin
C)Niacin
D)Riboflavin
E)Vitamin C





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