Enzymes Quiz

What is the role of enzymes in chemical reactions?

• To produce reactants

• To lower the activation energy

• To increase the activation energy

• To prevent the reaction from occurring

What is the function of the active site of enzymes?

• To bind to substrates

• To regulate product activity

• To produce reactants

• To raise activation energy

How are enzymes regulated?

• By adding or removing phosphates

• By changing their 3D shape

• By binding to separate sites on the enzyme

• By mimicking the substrate

Which statement is true about enzymes?

• Enzymes can only be used once

• Enzymes have no effect on chemical reactions

• Enzymes can bind to any substrate

• Enzymes can be used over and over

Which enzyme breaks down lactose carbohydrates?

• Amylase

• Glycogen synthase

• Lactase

• Ribonucleotide reductase

What is the function of phosphate in enzymatic reactions?

• To promote blood cell formation

• To active/inactivate enzymes

• To produce nucleotides

• To break down large carbohydrates

Which type of inhibition occurs when a molecule blocks the active site of an enzyme?

• Competitive inhibition

• Non-competitive inhibition

• Exergonic inhibition

• Endergonic inhibition

Which enzyme is responsible for connecting glucose molecules into long chains of glycogen?

• Amylase

• Glycogen synthase

• Lactase

• Ribonucleotide reductase

__________ are molecules that some enzymes need to interact with to function (example: Vitamin B12)