Enzymes — Practice Questions

Question 1

Enzymes are biological:

Accepted Answer

catalysts — Enzymes are biological catalysts.

Question 2

A catalyst is a substance that:

Accepted Answer

speeds up a reaction without being used up — A catalyst speeds up reactions and is not used up.

Question 3

Very high temperatures make an enzyme:

Accepted Answer

denature (lose its shape) — High heat denatures enzymes.

Question 4

Enzymes are made of:

Accepted Answer

protein — Enzymes are proteins.

Question 5

Each enzyme works best at a certain temperature and:

Accepted Answer

pH — Enzymes have an optimum temperature and pH.

Question 6

A denatured enzyme:

Accepted Answer

no longer works — Once denatured, an enzyme stops working.