Exam 6: Mechanisms of Enzymes

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A histidine was determined to be the critical residue involved in an enzyme-catalyzed reaction.If the pKa of the histidine is known to be 6.5 in the active site and the pH of maximum catalytic activity is 7.2,what is likely the primary role of histidine in the catalytic reaction?

(Multiple Choice)

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Question 81

A chemical group that has a negative charge or an unshared electron pair may act as a(n)

(Multiple Choice)

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Question 82

The enzyme has an active site which

(Multiple Choice)

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Question 83

Which statement describes the mechanism of lysozyme's catalyzed reaction?

(Multiple Choice)

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Question 84

If a plot of enzyme activity versus pH is sigmoidal then acid-base catalysis can be ruled out as a mode of catalysis.

(True/False)

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Question 85

Superoxide dismutase enzyme catalysis is faster than the rate of diffusion because it

(Multiple Choice)

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Question 86

Which amino acid is least likely to participate in acid-base catalysis?

(Multiple Choice)

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Question 87

The mechanism of action of lysozyme includes

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Question 88

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A histidine was determined to be the critical residue involved in an enzyme-catalyzed reaction.If the pKa of the histidine is known to be 6.5 in the active site and the pH of maximum catalytic activity is 7.2,what is likely the primary role of histidine in the catalytic reaction?

A chemical group that has a negative charge or an unshared electron pair may act as a(n)

The enzyme has an active site which

Which statement describes the mechanism of lysozyme's catalyzed reaction?

If a plot of enzyme activity versus pH is sigmoidal then acid-base catalysis can be ruled out as a mode of catalysis.

Superoxide dismutase enzyme catalysis is faster than the rate of diffusion because it

Which amino acid is least likely to participate in acid-base catalysis?

The mechanism of action of lysozyme includes

Introduction to Biochemistry

Water

Amino Acids and the Primary Structures of Proteins

Proteins: Three-Dimensional Structure and Function

Properties of Enzymes

Coenzymes and Vitamins

Carbohydrates

Lipids and Membranes

Introduction to Metabolism

Glycolysis

Gluconeogenesis, the Pentose Phosphate Pathway, and Glycogen Metabolism

The Citric Acid Cycle

Electron Transport and Atp Synthesis

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Nucleic Acids

DNA Replication, repair, and Recombination

Transcription and RNA Processing

Protein Synthesis

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