GCSE Food tests & enzymes

Enzymes are special substances in the body that help speed up the rate of chemical reactions. Enzymes can be found in . . .

• all body cells

• the digestive syste

• the blood

• all body cells, the digestive system and the blood

Enzymes are a type of _________. They speed up chemical reactions in the body.

• substrate

• product

• catalyst

• fantasist

Enzymes are biological catalysts that the body makes from ________.

• proteins

• metals

• gases

• carbohydrates

Tags

NGSS.HS-LS1-1

Carbohydrase enzymes break down carbohydrates, lipase enzymes break down lipids and protease enzymes break down proteins. What is the common suffix used for naming enzymes?

• -ase

• -att

• ide

The image shows the enzyme amylase breaking down __________ into sugar.

• starch

• protein

• fat

Tags

NGSS.MS-LS1-7

The image shows the enzyme amylase breaking down starch into sugar. Sugar is the _______ of the reaction.

• product

• substrate

• enzyme

The image shows the enzyme amylase breaking down starch into sugar. Starch is the _______ of the reaction.

• product

• substrate

• enzyme

Each type of enzyme has an active site that is a specific shape. Due to this shape, each type of enzyme only fits with one type of substrate. Which substrate does the enzyme shown in the image fit with?

• A

• B

• C

Each type of enzyme has an active site that is a specific shape. Due to this shape, each type of enzyme fits with . . .

• only one type of substrate

• all substrates

• just a few types of substrate

The lock and key model shows that only one shape of key will fit a specific lock. Once the substrate has fitted perfectly into the active site it forms an _____________

• enzyme-substrate complex

• complex enzyme

• denatured enzyme