B2 : The chemistry of food

Question 1

What three elements make up most parts of a cell

Answer 1

Carbohydrate’s, lipids and proteins

Question 2

Carbohydrates

Answer 2

Carbohydrates help provide us with energy, all carbohydrates contain carbon, oxygen and hydrogen.

Question 3

What is glucose

Answer 3

Glucose is a simple carbohydrate made up of a single carbohydrate molecule

Question 4

What is sucrose

Answer 4

A simple carbohydrate made up of two carbohydrate molecules joined together

Question 5

Lipids

Answer 5

Lipids are fats and oils, they are energy stores in our cells and combine with other molecules to form cell membranes

Question 6

What are lipids made of

Answer 6

Carbon, hydrogen and oxygen, they are insoluble in water

Question 7

Proteins

Answer 7

Polymers made up of amino acids joined together, there are 20 different amino acids that join to make new proteins. They are made up of carbon, hydrogen, oxygen and nitrogen

Question 8

What are proteins used for

Answer 8

To build cells and enzymes

Question 9

Give examples of complex carbohydrates

Answer 9

Starch, glycogen