Quiz on Enzymes and Their Functions

Enzymes are primarily made up of:

• Lipids

• Proteins

• Carbohydrates

• Nucleic acids

What is the function of enzymes in biological systems?

• Provide energy for reactions

• Slow down reactions

• Act as biological catalysts

• Change the products of reactions

The part of the enzyme where the substrate binds is called:

• Catalyst site

• Active site

• Binding pocket

• Reaction zone

Which of the following can denature enzymes?

• High temperature

• Extreme pH

• Heavy metals

• All of the above

What type of reaction does amylase catalyze?

• Breakdown of proteins

• Breakdown of starch

• Breakdown of fats

• Synthesis of DNA

Which term describes a molecule that decreases enzyme activity?

• Catalyst

• Activator

• Inhibitor

• Coenzyme

Which factor does NOT directly affect enzyme activity?

• Temperature

• pH

• Substrate concentration

• Light intensity

Which of the following enzymes works best in acidic conditions?

• Pepsin

• Trypsin

• Amylase

• Lipase

A coenzyme is usually:

• A small protein

• A lipid molecule

• A non-protein organic molecule (often vitamins)

• A carbohydrate

The enzyme that breaks down fats into fatty acids and glycerol is:

• Amylase

• Lipase

• Protease

• Maltase