Carbohydrates

Question 1

Formation of carbohydrates

Answer 1

Carbohydrates are formed in plant by a process known as photosynthesis.

Carbon dioxide is absorbed from the air through the leaves.
Water is absorbed from the soil through the roots.
Energy is absorbed from sunlight by chlorophyll (green pigment).
This energy is used to create glucose from carbon dioxide (CO2) and water (H2O).
Oxygen is released into the air.

Question 2

Equation for photosynthesis

Answer 2

Carbon dioxide + water + energy == glucose + oxygen

6Co2 + 6H2O + Sunlight == C6H12O6 + 6O2

Question 3

Elemental composition of carbohydrates

Answer 3

C - Carbon
H - Hydrogen
O - Oxygen

Question 4

Classification of Carbohydrates

Answer 4

Monosaccharides
Disaccharides
Polysaccharides

Question 5

Monosaccharides

Answer 5

Monosaccharides are simple sugar units.
They’re the basic units of all carbohydrates.

Question 6

Monosaccharides: Chemical Formula

Answer 6

C6 H12 O6

Question 7

Examples of monosaccharides and their sources

Answer 7

Glucose (fruit)
Fructose (fruit, honey)
Galactose (cheese

Question 8

Ring structure of a glucose unit

Answer 8

Draw on white board

Question 9

Disaccharides

Answer 9

Disaccharides are formed when two monosaccharides join together with the elimination of water (condensation reaction)

Question 10

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