Digestive Sysytem (Rev2)

Question 1

How do you test for Lipids/fats

Answer 1

Using ethanol

Question 2

How do you test for starch

Answer 2

Using iodine

Question 3

How do you test for sugar

Answer 3

Using Benedict solution

Question 4

How do you test for protein

Answer 4

Using biuret

Question 5

How can the pH have a bad affect on the enzyme?

Answer 5

The pH can break down the bonds holding the enzyme together

Question 6

What does the graph of the enzyme in a pH solution look like?

Answer 6

There is a sudden increase in gradient, then the graph peaks and fall at the same gradient as it rose.

Question 7

What happens when you increase temperature?

Answer 7

Kinetic energy increases

Question 8

If there is higher kinetic energy what will happen?

Answer 8

The enzymes and substrates collide more frequency.

Question 9

What do you call the peak of a graph?

Answer 9

The optimum

Question 10

What happens after the optimum is reached on a temperature-Enzyme efficiency graph?

Answer 10

The efficiency will decrease at a faster rate than it had increased before the optimum

Question 11

Why does the efficiency decrease after the optimum?

Answer 11

Because it gets so hot that the active site chnages

Question 12

What enzymes break carbohydrates?

Answer 12

Amylase

Question 13

What breaks down protein?

Answer 13

Protease

Question 14

What breaks down lipids?

Answer 14

Lipase

Question 15

What is Bile?

Answer 15

Alkaline to neutralise hydrochloric acid from the stomach

Question 16

Where is Bile made and stored?

Answer 16

It is made in the liver and stored in the gall bladder

Question 17

What does Bile do?

Answer 17

Emulsifies fat to form small droplets which increases surface area