Carbohydrates, lipids and proteins

Question 1

Insoluble substances

Answer 1

Starch, proteins and fats.

Question 2

Carbohydrates

Answer 2

Made up of units of sugar. They contain chemical elements carbon, hydrogen and oxygen.

Question 3

Complex carbs

Answer 3

Made up of a long chain of simple sugar units bonded together. (Starch and cellulose)

Question 4

Simple Sugars

Answer 4

Contain only one or two units of sugar. E.g. glucose

Question 5

The structure of lipid

Answer 5

3 fatty acids are joined to the glycerol molecule.

Question 6

Function of lipids

Answer 6

• energy
• important in nervous system
• important in cell membranes

Question 7

Lipid is insoluble in…

Answer 7

water.

Question 8

As the fatty acids change…

Answer 8

cause some lipids to be solid or liquid. Glycerol does not change.

Question 9

All nutrients are made up of…

Answer 9

carbon, hydrogen and oxygen.

Question 10

Protein molecule

Answer 10

Is made up of a long chain of amino acids.

Question 11

Amino acids can join…

Answer 11

in different ways to form different proteins.

Question 12

Proteins are folded…

Answer 12

to form shapes that are related to their different functions. (enzymes, hormones, antibodies)

Question 13

Protein denaturation

Answer 13

When the shape of a protein is lost because bonds holding the protein molecule are broken.