خامرے

An enzyme lowers the:

• 1 Substrate mass
• 2 Activation energy
• 3 Temperature
• 4 Product mass

A competitive inhibitor:

• 1 Increases the rate
• 2 Binds elsewhere on the enzyme
• 3 Is a substrate
• 4 Binds to the active site

The optimum pH of pepsin is about:

• 1 9
• 2 7
• 3 2
• 4 12

A non protein part that helps an enzyme to work is a:

• 1 Product
• 2 Cofactor
• 3 Hormone
• 4 Substrate

Increasing substrate concentration increases the rate of an enzyme reaction until:

• 1 The product stops forming
• 2 The temperature falls
• 3 All enzyme active sites are occupied
• 4 The pH rises