B2.1.4abc) To explain the role of enzymes as biological catalysts

Question 1

Anabolic reactions

Answer 1

Reactions that build up molecules
Enzymes bring substrate molecules together

Question 2

Catabolic reactions

Answer 2

Reactions that break down molecules
Enzyme active site affects the bonds in the substrate, easier to break

Question 3

Collision theory

Answer 3

Particles move- they might collide, might be facing the right way
Active site & substrate are complementary- might be a reaction

Question 4

Factors that effect rate of reaction

Answer 4

Increased number of successful collisions= increase rate of reaction
Increase in temp= increase rate of reaction
Increased substrate concentration= increase rate of reaction to a point
Increased enzyme concentration
Optimum pH

Question 5

Induced fit hypothesis

Answer 5

Active site is flexible
Catalytic confirmation
Substrate molecules binds to site
Product leave- the enzyme & active site reverts to original state