Food

Question 1

The 6 main elements found in organisms

Answer 1

Carbon. (CHONPS)
Hydrogen
Oxygen
Nitrogen
Phosphorus
Sulfur

Question 2

Element found in dissolved salts

Answer 2

Chlorine. (Cl)
Sodium. (Na)
Potassium. (K)
Magnesium. (Mg)
Clalcium. (Ca)

Question 3

Trace elements found in organisms

Answer 3

Copper. (Cu)
Zinc. (Ze)
Iron. (Fe)

Question 4

Bio molecules

Answer 4

Are the chemicals found in living things

Question 5

Functions of food

Answer 5

1. For energy
2. To control their metabolism

Question 6

(Organic molecules)
4 major bio molecules found in food

Answer 6

Carbohydrates
Lipids
Proteins
Vitamins

Question 7

Types of carbohydrates

Answer 7

•Monosaccharides- single sugar units e.g glucose (fruit)
•disaccharides- double sugar units e.g sucrose (table sugar)
• polysaccharides- many sugar units e.g cellulose (vegetables)

Question 8

Elements of carbohydrates

Answer 8

Carbon
Hydrogen
Oxygen
(Twice as many hydrogen atoms as oxygen atoms)
Glucose= C6H12O6

Question 9

Elements in lipids

Answer 9

Carbon
Hydrogen
Oxygen
(In a different ratio to carbohydrates)

Question 10

A triglyceride

Answer 10

3 fatty acid molecules
1 glycerol molecule

Question 11

A phospholipid molecule

Answer 11

2 fatty acid
Phosphate
Glycerol