National 5 Biology - Enzymes

Enzymes can be involved in two types of reaction - degradation and _______ ?

Is this a degradation or synthesis reaction?

• Degradation

• Synthesis

What is the optimum pH in this enzyme reaction?

• 0.5

• 1.5

• 3.5

• 5.5

Look at the diagram carefully. The diagram below shows how the enzyme lactase is used in the production of lactose-free milk. This process is an example of a _____ reaction.

• Degradation

• Synthesis

When an enzyme becomes denatured the _________ changes shape.

• Active site

• Enzyme

• Substrate

• Reaction

Enzymes are biological catalysts because they _____ _____ biochemical reactions.

• Speed up

• Slow down

The active site of an enzyme is complementary to

• one type of substrate molecule

• all types of substrate molecules

• one type of product molecule

• all types of product molecules.

All enzymes are made of...

• carbohydrates

• glycerol

• proteins

• fatty acids.

Which sequence of letter represents a synthesis reaction?

• Q - R - P

• P - Q - R

• P - R - Q

• Q - P - R

Enzymes speed up cellular processes and are _______ in the process.

• Changed

• Unchanged