YR 10 Enzymes

Question 1

enzyme

Answer 1

a biological catalyst (typically proteins) that significantly speed up the rate of virtually all of the chemical reactions that take place within cells

Question 2

substrate

Answer 2

a molecule upon which an enzyme acts

Question 3

active site

Answer 3

is the region of an enzyme where substrate molecules bind and undergo a chemical reaction

Question 4

catalyse

Answer 4

To catalyse a reaction, an enzyme will grab on (bind) to one or more reactant molecules. These molecules are the enzyme’s substrates

Question 5

catalyst

Answer 5

a chemical that helps to speed up a chemical reaction but is not used up by the reaction

Question 6

optimum temperature/pH

Answer 6

This optimal temperature is usually around human body temperature (37.5 oC) for the enzymes in human cells. Above this temperature the enzyme structure begins to break down (denature)

Question 7

product

Answer 7

a substance produced by a chemical reaction