b5

Question 1

enzyme

Answer 1

are proteins that act as biological catalysts and are involved in all metabolic reactions.

Question 2

enzyme action

Answer 2

Enzymes have an active site where the substrate binds to form an enzyme–substrate complex, which is then converted into products.

Question 3

enzyme to substrate steps

Answer 3

-Substrate binds to active site
-Enzyme–substrate complex forms
-Reaction occurs
-Products are released
-Enzyme remains unchanged

Question 4

specifity of enzyme

Answer 4

Enzymes are specific because the active site has a complementary shape to the substrate.

Question 5

low temp on enzyme activity

Answer 5

-Low kinetic energy
-Fewer collisions → slow reaction

Question 6

optimum temperature on enzyme activity

Answer 6

-enzyme works best
-maximum activity

Question 7

high temp on enzyme activity

Answer 7

-Enzyme denatures ❌
-Active site changes shape
-Substrate cannot bind

Question 8

effect of pH on enzyme activity

Answer 8

-Correct pH → active site shape is perfect ✔️

-Wrong pH:
Changes shape of active site ❌
Substrate cannot fit

-Extreme pH:
Enzyme denatures ❌