B4 Biological molecules

Question 1

What elements are carbohydrates made of?

Answer 1

Carbohydrates primarily consist of the elements carbon, hydrogen, and oxygen.

Question 2

What Elements are Proteins made up of?

Answer 2

Proteins are composed of the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.

Question 3

What Elements are Fats made up of

Answer 3

Fats, also known as lipids, are primarily composed of carbon, hydrogen, and oxygen.

Question 4

What are starch, glycogen and cellulose are made up of?

Answer 4

glucose

Question 5

What are amino acids made up of?

Answer 5

amino acids

Question 6

What are fats and oils made up of

Answer 6

fatty acids and glycerol

Question 7

Describe the use of Benedict’s solution test for reducing sugars

Answer 7

Benedict’s solution test detects reducing sugars by undergoing a color change from blue to green, yellow, orange, or red upon heating in their presence.

Question 8

Describe the use of iodine solution test for starch

Answer 8

The iodine solution test produces a blue or black color in the presence of starch.

Question 9

Describe the use of biuret test for proteins

Answer 9

The Biuret test detects proteins by producing a violet color change when treated with Biuret reagent.

Question 10

Describe the use of ethanol emulsion test for fats and oils

Answer 10

The ethanol emulsion test is used to detect the presence of fats and oils. When a sample is mixed with ethanol and shaken vigorously, the formation of a cloudy or milky emulsion indicates the presence of fats or oils.