Digestion of Fats, Proteins and Carbohydrates

Question 1

When starch is broken down, what does it become?

Answer 1

Glucose

Question 2

When fat is broken down, what does it become?

Answer 2

Glycerol and fatty acids

Question 3

When protein is broken down, what does it become?

Answer 3

Amino acids

Question 4

What reagent is used to test for protein?

Answer 4

Biuret (By-you-ret)

Question 5

What reagent is used to test for glucose?

Answer 5

Benedict’s

Question 6

What reagent is used to test for starch?

Answer 6

Iodine

Question 7

What is the method to test for protein?

Answer 7

Add blue Biuret to some food in a test tube

Question 8

What is the method to test for glucose?

Answer 8

Add blue Benedict’s to some food in a test tube

Place the test tube in boiling water bath for 5 minutes

Question 9

What is the method to test for starch?

Answer 9

Add brown iodine to some food

Question 10

What is the positive result when testing for protein?

Answer 10

A lilac colour

Question 11

What is the positive result when testing for glucose?

Answer 11

Turns green, orange then brick red

Colour change depends on concentration of glucose

Question 12

What is the positive result when testing for starch?

Answer 12

A blue-black colour