ENZYMOLOGY QUIZ 1

1. Which of the following best describes most enzymes?
   
   
   

• 1. A. Fibrous proteins

• 1. B. Globular proteins

• 1. C. Globin proteins

• 1. D. Ligand proteins

What is the typical size range of enzymes in terms of amino acid residues?

• 10–50

• 60–2,500

• 2,500–5,000

• 1–25

Which of the following is a non-protein enzyme?

• Lipase

• Pepsin

• Ribozymes

• Sucrase

Which part of the enzyme is directly involved in catalysis?

• Whole enzyme surface

• Regulatory site

• Active site

• Cofactor site

What usually happens when an enzyme is denatured?

• It increases its activity

• It forms a holoenzyme

• It unfolds and becomes inactive

• It becomes a coenzyme

What is an apoenzyme?

• A fully functional enzyme

• The non-protein part of an enzyme

• The protein part of an enzyme

• A prosthetic group

Which of the following is a holoenzyme?

• Coenzyme + substrate

• Apoenzyme + cofactor

• Substrate + inhibitor

• Protein + Enzyme

Which of the following enzymes is a simple apoenzyme?

• Pepsin

• Hexokinase

• RNA polymerase

• Cytochrome oxidase

If an enzyme contains a tightly bound non-protein part, it is called a:

• Cofactor

• Coenzyme

• Prosthetic group

• Holoenzyme

Which of the following is an example of a coenzyme?

• Mg²⁺

• Zn²⁺

• NAD

• Fe²⁺