Cambridge Checkpoint Science (8): Enzymes

Large molecules of nutrients must be broken down into ______

• Small pieces

• Small molecules

The molecules of nutrients must be broken down to ____

• Be absorbed

• Produce chemicals such as enzymes

In the mouth, teeth ___

• Break down big molecules of nutrients into smaller ones

• Don’t have any effect on the nutrients

• Break down big pieces of food into smaller ones

The large molecules of nutrients are broken down by ___

• Teeth

• Chemicals

_____is changing a substance made up of large molecules into a new substance made up of small molecules

• Digestion

• Absorption

When a substance is changed into a different one means that a ____ has happened

Starch is changed to _____

Protein is changed to _____

Teeth cause a chemical reaction

• True

• False

• It depends

During a chemical reaction, enzymes change.

• True

• False

• Sometimes