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Which of the following helps enzyme to function well?

• Product

• Cofactor

• Inhibitor

• Substrate

Diagram 5 shows the mechanism of enzyme action.

Which part labelled A, B, C and D represents the substrate?

• A

• B

• C

• D

Diagram 5 shows the action of an enzyme on a substrate.

What is S if P is lactase, Q is lactose and R is glucose?

• maltose

• glucose

• fructose

• galactose

Which of the following is an enzyme inhibitor?

• Iron

• Mercury

• Penicillin

• Vitamin B

Which equation shows the enzymatic reaction in stomach?

• Starch + water --^Amylase----> Maltose

• Protein + water --^Pepsin--> Polypeptide

• Fat+ water --^Lipase---> Fatty acids + Glycerol

• Lactose+ water --^Lactase---> Glucose + Galactose

What 3 letters do enzymes typically end in?

• -ose
• -ase
• -ese
• -tic

Enzymes are

• Protiens

• Lipids

• Carbohydrates

• DNA

On an enzyme, the site that attaches to a substrate

• Polypeptide

• Base

• Substrate

• Active site

Many coenzymes are

• metals
• vitamins
• proteins
• substances

How do enzymes speed up chemical reaction?

• Increasing activation energy
• Decreasing activation energy
• Increasing deactivation energy
• Decreasing deactivation energy