SB1g Enzyme Action

Question 1

state what enzyme specificity means

Answer 1

Enzymes are specific because different enzymes have different shaped active sites. Shape of active site of enzyme is compulsory to the substrate.

Question 2

Use the lock-and-key model to develop explanations

for enzyme activity.

Answer 2

The substrate is like the key to the active site, like the lock.

Question 3

Explain why enzymes have a particular shape, as a

result of the sequence of amino acids in the chain.

Answer 3

Proteins are chains of amino acids joined end to end.not straight, twists and folds as different amino acids in the chain are attracted to, or repel each other.
Each enzyme is comprised of proteins made of these twisting and folding amino acids, and therefore the enzyme has a unique shape.

Question 4

Explain how enzymes become denatured.

Answer 4

If enzymes are exposed to extremes of pH or high temperatures the shape of their active site may change. which causes enzyme to denature.