Enzymes (in Depth)

Question 1

What is amayalse

Answer 1

A digestive enzyme

Question 2

Where is amaylase found

Answer 2

In the salivary glands,small intestine and pancreas

Question 3

What does amalayse break down

Answer 3

Starch into glucose

Question 4

Where is protease found

Answer 4

Stomach,pancreas and small intestine

Question 5

What does protease break down

Answer 5

Protein into amino acids

Question 6

What are enzymes

Answer 6

Biological catalys that speed up chemical reactions

Question 7

Where is lipase found

Answer 7

Small intestine and pancreas

Question 8

What is the name of the three enzymes

Answer 8

Protease,lipase,amaylase

Question 9

What does lipase break down

Answer 9

Fatty acids and glycerol

Question 10

What is the 4 steps of enzyme action

Answer 10

1. Every enzyme has an active site which is complementary to the substrate
   2.The substrate will fit and bind to the active site of the enzyme
   3.The enzyme will Either break down the substrate into smaller forms or put together small molecules to form large molecule
   4.The product will be realised and the enzyme remains unchanged

Question 11

What is the lock and key method

Answer 11

The lock and key method is a simplified version of how an enzyme works.it states that the active site of an enzyme fits the substrate perfectly like a lock and key

Question 12

What are four factors that affect enzyme activity

Answer 12

Temperature,ph,enzyme concentration and substrate concentration

Question 13

How does temperature effect enzyme activity (3 points)

Answer 13

1. As temperature increases,enzyme activity/ rate of reaction increases up to optimum temperature which is the best temperature for enzyme activity.
   2.at low temperatures, enzyme activity is low because energy has low kinetic energy so there are few collisions into the substrate
   3.when temperature is too high, the enzyme will denature which means the active site will change chaps and the substrate can no longer fit j to the active site so the reaction stops

Question 14

How does ph effect enzyme activity

Answer 14

Different enzymes have a certain oh it works best in and if it is the wrong ph the enzyme will denature

Question 15

How do you calcite the relative rate of reaction

Answer 15

1/time because the mass of startch used at each rate p is the same.You can then compare rates of reaction of amylase at different ph’s

Question 16

What is the independent variable

Answer 16

The thing you change

Question 17

What is the dependent variable

Answer 17

The result we can measure

Question 18

What is the control variable

Answer 18

The thing you keep the same

Question 19

Why do we keep the control variable the same

Answer 19

So it is repeatable and that makes it reproducible