5. Enzymes

Question 1

catalyst

Answer 1

a substance that increases the rate of a chemical reaction and is not changed by the reaction

Question 2

enzymes

Answer 2

proteins that are involved in all metabolic reactions, where they function as biological catalysts

Question 3

why are enzymes important in all living organisms

Answer 3

maintain reaction speeds of all metabolic reactions at a rate that can sustain life.

Without enzymes, reactions would take place very slowly or not at all.

Question 4

Enzyme action

Answer 4

the shape of the active site of an enzyme is complementary to its substrate so that substrate fits into active site and enzyme-substrate complex is formed and products are formed.

they are specific

Question 5

effect of changes in temperature on enzyme

Answer 5

optimum temperature

kinetic energy increases

frequency of effective collisions increases

denaturation- shape of active site changes so substrate can no longer fit and bind and enzyme-substrate complex won’t be formed

Question 6

effect of changes in pH on enzyme

Answer 6

denaturation- shape of active site changes so substrate can no longer fit and bind and enzyme-substrate complex won’t be formed