Enzyme Activity

Question 1

enzyme concentration

Answer 1

increased number of active sites
more enzyme-substrate form until substrate conc becomes limiting factor

Question 2

Substrate Concentration

Answer 2

increased number of enzyme-substrate complex
until all enzymes are working still leaving substrate to be brocken down
enzyme conc will become limiting factor

Question 3

pH

Answer 3

each enzyme has optimum pH. Above or below decreases rate of reaction
affects hydrogen bonds that holds the active site

Question 4

Temperature

Answer 4

have optimum temp
increase = increase in kinetic energy and rate of reaction
above optimum rate rate of reaction decreases until enzyme denatures

Question 5

Competitive inhibitor

Answer 5

• compete for the active site of enzyme
  active site blocked not able to catalyse the reaction. reaction slows down

Question 6

non competitive inhibitor

Answer 6

binds to the allosteric site
causing the enzyme’s active site to change
rate of reaction decreases drastically

Question 7

lock + key model

Answer 7

enzyme active site is complementary to substrate
fits on collision
coplex formed
reaction occurs

Question 8

induced fit model

Answer 8

the active site is not completely complimentary to the substrate
a collision occurs, the enzyme changes its shape slightly to fit the active site around the substrate
complex formed
reaction occurs