UNIT 3 - Enzymes

Question 1

What are the properties of enzymes?

Answer 1

Highly substrate specific, globular proteins, soluble, spherical, tertiary structure, fast acting. Affected by temp + pH.

Question 2

What do enzymes have which allows them to catalyse reactions?

Answer 2

Highly substrate specific active site (substrate receptor site) which is complementary to a particular substrate.

Question 3

When enzymes react and combine with the substrate, what do they form? What happens when the reaction is over?

Answer 3

Enzyme/substrate complex. Products are released and enzyme is left unchanged.

Question 4

Enzymes are fast acting, what does this mean?

Answer 4

High turnover number. Convert many molecules of substrate per unit time.

Question 5

What can enzymes build up and break down and how?

Answer 5

Molecules (carbs, proteins, lipids) hydrolysed by digestive enzymes. (starch + glycogen) built up from monomers for storage.

Question 6

What type of protein are most enzymes? e.g. fibrous/conjugated etc.

Answer 6

Conjugated protein.