Enzymes

Question 1

What is an enzyme?

Answer 1

A biological catalyst. A substance that increases the rate of a chemical reactions without itself undergoing any permanent chemical change

Question 2

What do Lipase, Protase, and Amylase do?

Answer 2

Lipase= breaks down lipids to form fatty acids and glycerol

Protase= breaks down proteins to form amino acids

Amylase= breaks down starch to form maltose or simple sugars

Question 3

Explain why amylase does not work to break down fats or proteins

Answer 3

Enzymes only work on a specific substance. This is because they have an active site that only fits a particular substance. Amylase is a carbohydrase- it breaks down starch but not proteins or fats. Lipase and protease are the enzymes which would need to be present to break down the fats and proteins

Question 4

what I the optimum pH for amylase?

Answer 4

7

Question 5

Suggest a suitible temperature for a wash using biological washing powder, why?

Answer 5

37’C as that is the optimum temp for enzyme action

Question 6

Describe the structure of an enzyme

Answer 6

They are proteins that contain a highly specific active site that fits a specific substrate

Question 7

Describe enzyme action

Answer 7

A substrate that fits the specific active site of the enzyme binds to create an enzyme-substrate complex, a reaction occurs (catacylsed by the enzyme) and then the products are released.

Question 8

What would reduce the rate of production of amino acids?

Answer 8

raising the pH to 7.5

Question 9

At which temperature does lactase work fastest?

Answer 9

37’C

Question 10

At which temperature do most enzymes from the human body become completely denatured?

Answer 10

65°C

Question 11

he optimum pH for most enzymes