Enzymes

Enzymes speed up (__________) chemical reactions.

• substrate

• catalyze

• active site

• products

A ___________ binds to the active site of an enzyme and is converted into products.

• substrate

• soil

• catalyzer

• metabolism

In the digestive system, enzymes help:

• to break down toxins in the body.

• the body break down larger complex molecules into smaller molecules.

• to unwind the DNA coils and copying the

  information.

• to control cell division.

Enzymes are important in DNA replication, because:

• The help the body break down larger complex molecules into smaller molecules,

• They help in this process by unwinding the DNA coils and copying the information.

• They help breaking down toxins.

The liver uses a range of enzymes, to:

• Break down larger complex molecules into smaller molecules

• Help in the processs of cell division.

• Break down toxins in the body.

The "lock and key model" proposed:

• The active site changes shape as it interacts with the substrate.

• An enzyme’s active site is a specific shape, and only the ubstrate will fit into it.

The "induced-fit model", proposes:

• The active site changes shape as it interacts with the substrate.

• An enzyme’s active site is a specific shape, and only the substrate will fit into it.

Most enzymes in the human body, work best in this temperature, approximately:

• 40°C

• 37°C

• 33°C

• 20°C

Enzymes can only function in certain acidic or alkaline conditions, that depends on:

• Where they are found in the body.

• How is the shape of the enzyme.

• The temperature of the body.

• The model they are using.

What does it mean "denatured" for the enzymes?

• When the enzyme changes shape due to higher temperatures and pH changes in the environment.

• When the enzyme is not in the right part of the body.

• ]When there is not substrate for the enzyme.