Dub topic 3

Question 1

The substance that binds to the active site of the enzyme is called a:

Answer 1

Substrate

Question 2

What best explains why enzymes are necessary for reactions in our cells?

Answer 2

Enzymes supply the oxygen necessary for the reactions.

Question 3

Changes in pH and temperature can ___________________ an enzyme which causes it to lose its shape and affects its function.

Answer 3

denature

Question 4

What is the optimal pH for this enzyme?

Answer 4

8

Question 5

The enzyme’s active site and the shape of the substrate molecule are complementary to one another.

Answer 5

Lock & Key Model

Question 6

The enzyme functions best at what temperature range?

Answer 6

30-40 degrees

Question 7

The enzyme functions best when the environment is:

Answer 7

Neutral

Question 8

The enzyme probably does not function at 70°C because:

Answer 8

The protein in the enzyme changes shape at that temperature

Question 9

Example of enzymes:

Answer 9

amylase and lipase

Question 10

Coenzymes definition:

Answer 10

 Coenzymes are small, non-protein organic molecules that carry chemical groups between enzymes (e.g. NAD and FAD). Forms easily removed loose bonds.

Question 11

Cofactors definition:

Answer 11

Non-protein chemical compound that tightly and loosely binds with an enzyme or other protein molecules.

Question 12

How does the structure of the mitochondria assists its function?

Answer 12

The inner membrane is extensively folded, which increases surface area for ATP production.