CB1f Enzyme Action

Question 1

Describe the shape of a protein

Answer 1

Large 3D molecule formed from a chain of amino acids

Question 2

Describe the active site

Answer 2

The region on an enzyme that binds to a protein or other substance during a reaction

Question 3

Only the substrate molecule with the right shape will fit into the enzyme allowing the reaction to take place, true or false?

Answer 3

True

Question 4

Describe the Lock and Key hypothesis

Answer 4

When the substrate will fit into the active site when it has a complementary shape. The substrate acts as a key and the lock acts as a lock.

Question 5

When does an enzyme work best?

Answer 5

When it is at the optimum temperature or pH

Question 6

What affects the enzymes rate of reaction?

Answer 6

Temperature
pH
Substrate concentration

Question 7

How does temperature affect enzymes?

Answer 7

When the temperature is too low the reaction will be slow to take place. Once the temperature is optimum - usually at 37 degrees celsius, the enzyme will work at its fastest rate. If the temperature gets too high the enzyme will denature and no longer catalyse a reaction.

Question 8

What are enzymes?

Answer 8

Biological catalysts that speed up chemical reactions without getting used up