Enzymes

Question 1

Name an example an intracellular and an extracellular enzyme

Answer 1

Intracellular- Catalase

Extracellular- Amylase

Question 2

Define an enzyme

Answer 2

Proteins that act as biological catalysts to accelerate chemical reaction

Question 3

Explain the lock and key hypothesis

Answer 3

Every enzyme has an exact complememtary shape to substrate

Question 4

Explain the induced fit hypothesis

Answer 4

Enzyme has generally right active site shape for substrate but changes shape slightly to fit substrate better

Question 5

Define denatured

Answer 5

Permanent change to active site. Means no more enzyme substrate complexes can be formed

Question 6

Name all factors taht inhibit enzymes

Answer 6

Temperature
pH
Enzyme concentration
Substrate concentration
Competitive inhibitor
Non-competetive inhibitors

Question 7

Explain the graph of effects of temperature on rate of reaction of enzymes

Answer 7

Steady increase to the optimum temperature, then a decline the 0

Question 8

Explain the graph of effects of pH on rate of reaction of enzymes

Answer 8

Graph is symmetrical around the optimum pH, going to 0 on each side

Question 9

Explain the graph of effects of enzyme concentration on rate of reaction of enzymes

Answer 9

Constant rate of increase (y=x)

Question 10

Explain the graph of effects of substrate concentration on rate of reaction of enzymes

Answer 10

Constant increase up to a point, then flattens