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Enzymes: Structure, Function, and Regulation

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Enzymes: Structure, Function, and Regulation

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Questions and Answers

What is the primary function of enzymes in chemical reactions?

To alter the pH of the reaction

To increase the activation energy of the reaction

To decrease the activation energy of the reaction (correct)

To change the temperature of the reaction

At what temperature do enzymes typically function in the human body?

37°C (correct)

30°C

40°C

20°C

What is the unit of measurement for the amount of enzyme that catalyzes the conversion of one micromole of substrate to product per minute?

IU/min

mol/min

g/min

μmol/min (correct)

Which of the following factors does not affect enzyme activity?

Pressure Signup and view all the answers

What is the optimal pH for the enzyme pepsin in gastric juice?

1.5-2 Signup and view all the answers

What is the term for the RNA molecules that can catalyze chemical reactions?

Ribozymes Signup and view all the answers

What is the unit of katal?

1 mol/s Signup and view all the answers

What is the specific activity of an enzyme dependent on?

The amount of protein Signup and view all the answers

What is the term for the combination of an apoenzyme and its cofactor?

Holoenzyme Signup and view all the answers

What determines the reaction specificity and substrate specificity of an enzyme?

The structure of the active site Signup and view all the answers

What is the term for an enzyme that is composed only of protein?

Simple enzyme Signup and view all the answers

What is the classification of enzymes that catalyze oxidation and reduction reactions?

Oxidoreductases Signup and view all the answers

What type of enzyme is carbonic anhydrase?

Lyase Signup and view all the answers

What is the general suffix of an enzyme name?

-ase Signup and view all the answers

What is the function of glucokinase?

Convert glucose to glucose-6-phosphate Signup and view all the answers

What is the main difference between hexokinase and glucokinase?

Affinity for glucose Signup and view all the answers

What is the EC number classification system used for?

Classifying enzymes based on their reaction type Signup and view all the answers

What is the composition of LDH-1 isozyme?

4H Signup and view all the answers