Food - Randol Qs

Question 1

Why do organisms require food

Answer 1

Source of energy

Growth and repair of structures in the organism

Question 2

What is a polysaccharide

Answer 2

Carbohydrate with many sugar units

Question 3

Name one structure of polysaccharides

Answer 3

Cellulose

Question 4

Describe the composition of a triglyceride molecule

Answer 4

Glycerol and 3 fatty acids

Question 5

Give a structural role of lipids in the human body

Answer 5

Protection of organs

Question 6

Name a test or give the chemicals used to demonstrate the presence of protein in a food sample

Answer 6

Buiret test/ sodium hydroxide

Question 7

Name a protein that has a fiberohs structure

Answer 7

Keratin

Question 8

Where is keratin found

Answer 8

Hair and nails

Question 9

Give a role if a named mineral other than calcium, required by plants

Answer 9

Mineral : nitrates

Role in plants : used to make proteins

Question 10

Identify a non metallic element, other than c h o n commonly found in the proteins

Answer 10

Sulphur

Question 11

Give a metabolic role if proteins in the human body

Answer 11

Form anti-bodies to fight infection

Question 12

Structural role of proteins in human body

Answer 12

Keratin

Question 13

2 biomolecular components in liquid

Answer 13

Glycerol

Fatty acids

Question 14

Where do you find phospholipids in human cells?

Answer 14

Cell membrane

Question 15

Give a named mineral, other than iron which is required in the human body

Answer 15

Mineral: calcium
Role: strong bones