Ch 4 Enzymes Quiz

What are enzymes primarily known for in biochemical reactions?

• They are structural proteins.

• They are protein catalysts.

• They are energy sources.

• They are genetic materials.

By how much can enzymes accelerate the rate of a reaction?

• By factors of ten.

• By factors of a hundred.

• By factors of a million or more.

• By factors of a thousand.

Which of the following is a basic principle related to enzymes?

• Enzyme synthesis

• Enzyme degradation

• Enzyme catalysis

• Enzyme mutation

Which enzyme has the highest rate enhancement according to the table?

• OMP decarboxylase

• Staphylococcal nuclease

• Carboxypeptidase A

• Carbonic anhydrase

What is the nonenzymatic half-life of AMP nucleosidase?

• 78,000,000 years

• 130,000 years

• 69,000 years

• 7.3 years

How much does carbonic anhydrase accelerate the hydration of CO₂?

• 1 million fold

• 10 million fold

• 100 million fold

• 1 billion fold

What are enzymes?

• Lipids that store energy

• Proteins that catalyze chemical reactions inside the cell

• Carbohydrates that provide structure

• Nucleic acids that store genetic information

Which of the following is a benefit of enzymes over most chemical catalysts?

• Lower reaction rates

• Higher reaction rates

• Higher temperatures required

• Less specificity

Enzymes work best under which conditions?

• Extreme pH and temperature

• High pressure and low temperature

• Physiological pH and temperature

• Low pH and high temperature

What is meant by greater reaction specificity in enzymes?

• They react with any available substrate

• They are specific to reactants and products, including their stereochemistries

• They only work in acidic environments

• They are non-specific and work with all chemicals