خامرے

Enzymes are made of:

• 1 Proteins
• 2 Carbohydrates
• 3 Lipids
• 4 Nucleic acids only

The substance on which an enzyme acts is called the:

• 1 Substrate
• 2 Inhibitor
• 3 Product
• 4 Coenzyme

Most human enzymes work best at about:

• 1 37 degrees C
• 2 0 degrees C
• 3 100 degrees C
• 4 70 degrees C

At a very high temperature, an enzyme:

• 1 Turns into a carbohydrate
• 2 Works faster forever
• 3 Is denatured and stops working
• 4 Becomes a substrate

The lock and key model explains:

• 1 How cells divide
• 2 How plants make food
• 3 How enzymes fit their specific substrates
• 4 How blood circulates

An enzyme is not used up in the reaction because it is a:

• 1 Product
• 2 Substrate
• 3 Catalyst
• 4 Reactant

Enzyme names usually end in:

• 1 -ine
• 2 -ase
• 3 -ide
• 4 -ose

Amylase digests:

• 1 Fat
• 2 Protein
• 3 Starch
• 4 Cellulose only

Very low temperature makes an enzyme:

• 1 Larger
• 2 Denatured permanently
• 3 Inactive
• 4 Faster