Chapter 3- Food And Biomolecules

Question 1

What are functions for food?

Answer 1

Energy
Grow and repair
Control chemical reactions

Question 2

What are the major molecules found in food?

Answer 2

Carbohydrates,Lipids,
Proteins,Vitamins (organic)
Minerals (inorganic)

Question 3

Elements of carbohydrates?

Answer 3

Carbon, C
Hydrogen, H
Oxygen, O

Question 4

Structure of carbohydrates?

Answer 4

Monosaccharides- single sugar molecules (glucose)
Disaccharides- Double sugar molecules (sucrose)
Polysaccharides- many sugar units (glycogen)

Question 5

Sources of carbohydrates?

Answer 5

Monosaccharides- fruit (glucose)
Disaccharides- Sugar (sucrose)
Polysaccharides- Bread (glycogen)

Question 6

Structural role of carbohydrates?

Answer 6

Chitin forms skeleton of insects

Question 7

Metabolic role of carbohydrates?

Answer 7

Starch is a storage carbohydrate (glucose in plants)

Glycogen stores carbohydrates in animals

Question 8

Structure of lipids?

Answer 8

Glycerol and 3 fatty acids- triglyceride

Glycerol and 2 fatty acids and a phosphate- phospholipid

Question 9

Structural role of lipids?

Answer 9

Glucose is an immediate source of energy

Question 10

Metabolic role of lipids

Answer 10

Lipids release energy when broken down in respiration

Question 11

Structure of Protein

Answer 11

Amino acids connected by a peptide bond

Eg. Nitrogen

Question 12

Sources of protein

Answer 12

Lean meat

Fish

Question 13

Structural role of protein

Answer 13

Found as keratin in hair

Question 14

Metabolic role of protein

Answer 14

Enzymes are made of protein

Question 15

Source of vitamin C

Answer 15

Fruit

Question 16

Deficiency of vitamin C

Answer 16

Scurvy

Question 17

Source of vitamin D

Answer 17

Dairy products

Sunlight

Question 18

Deficiency of vitamin D

Answer 18

Rockets in children