enzymes

Question 1

2 models for enzyme theory

Answer 1

lock and key
induced fit ( modern idea)

Question 2

what determines an enzymes shape

Answer 2

the globular tertiary structure of the protein

Question 3

process of enzyme action

Answer 3

substrate and active site complementary
they bind to form an enzyme-substrate complex
products are released

Question 4

role of an enzyme

Answer 4

biological catalyst

Question 5

factors affecting enzyme activity

Answer 5

concentration (substrate/enzyme)
temperature
pH

Question 6

what happens when an enzyme denatures

Answer 6

the tertiary structures changes the 3D shape
this means the active site shape is changed so is no longer complementary
no enzyme-substrate complex can form
no reaction can be catalysed

Question 7

effect of temperature enzymes

Answer 7

more kinetic energy, increased force of collision so increased enzyme activity

until denaturation

Question 8

effect of pH on enzymes

Answer 8

H+ ions disrupt hydrogen and ionic bonds in a molecule which results in denaturation