Enzymes and Their Functions Quiz

What is the role of an enzyme's active site?

• To change the enzyme's shape permanently

• To bind specifically with substrates

• To produce energy for the cell

• To bind with any molecule

What happens when a substrate binds to an enzyme?

• The enzyme becomes inactive

• The enzyme is consumed in the reaction

• The substrate is permanently attached

• Induced fit occurs, changing the active site's shape

What is the function of the enzyme lactase?

• To build up lactose molecules

• To digest proteins

• To break down lactose into smaller parts

• To convert lactose into glucose

What suffix is commonly found at the end of enzyme names?

• -ine

• -ite

• -ase

• -ose

What is the term for enzymes that can be used repeatedly in reactions?

• Inhibitors

• Catalysts

• Products

• Reactants

What can cause an enzyme to become denatured?

• Presence of cofactors

• Excessive substrate concentration

• Changes in pH or temperature outside its ideal range

• Optimal pH and temperature

What is the role of cofactors and coenzymes?

• To denature enzymes

• To permanently bind to enzymes

• To help enzymes build up or break down substrates

• To inhibit enzyme activity

What is the relationship between lactose and lactase?

• Lactose and lactase are unrelated

• Lactase is a sugar that builds up lactose

• Lactose is an enzyme that breaks down lactase

• Lactase breaks down lactose into digestible parts

What is a common characteristic of sugars in terms of their naming?

• They end in -ate

• They end in -ase

• They end in -ose

• They end in -ine

What is the analogy used to describe the enzyme-substrate interaction?

• A lock and key

• A Pac-Man and pebbles

• A magnet and metal

• A puzzle piece and board