Biological Molecules

Question 1

Carbohydrates

Answer 1

Carbohydrates are made of carbon,hydrogen, and oxygen. They are used as a source of energy for the body. There are three types of carbohydrates: Monosaccharides, disaccharides, and polysaccharides.

Question 2

Fats/Oils

Answer 2

Fats are made of carbon, hydrogen, and oxygen. The oxygen content is lower than in carbohydrates. Fats have various purposes in the body

Question 3

Proteins

Answer 3

Proteins are made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur or phosphorus. They are extremely important to the body and serve many different functions.

Growth
Repair
Energy
Membrane formation

Question 4

Starch test

Answer 4

Add a few drops of iodine solution
Blue/black coloration means starch is present

Question 5

Benedict’s test

Answer 5

Add equal amount of benedicts solution into a solution of food and boil gently

Question 6

Biuret test

Answer 6

Add an equal amount of sodium hydroxide to a solution of food and mix

Question 7

Emulsion test

Answer 7

Dissolve food in ethanol and pour the solution into a clean tube of water
White emulsion signifies the presence of fat

Question 8

DNA STRUCTURE

Answer 8

The double helix is held together via pairs of bases that are attracted to each other from one strand to the other.

Question 9

Water

Answer 9

water is essential to the human body for many things. One of these things being the fact that water is an important solvent. This means that nutrients and wastes can be dissolved in water so that it can be transported around the body. Moreover, majority of our chemical reactions inside our bodies are controlled by enzymes