Intro to nutrition

1. EIS Teaching – Learning Strategies / Procedures
Biology Secondary 4, duration 60 min.
Teacher: Mr.Wichai Likitponrak

2. Look at this Picture!
What is
This?

3. Carbohydrates
Carbohydrates Contain the Elements:
Carbon
Hydrogen
Oxygen
They Are Split Into Three Groups Known As:
Monosaccharides(Monomers)
Disaccharides(Dimers)
Polsaccharides(Polymers)

4. Carbohydrates
•Many carbohydrates are soluble in water.
•The usual chemical test for the simpler
carbohydrates is heating with Benedicts solution.
•The formula for a carbohydrate is (CH2O)n
•The n represents the number of times the CH2O
unite is repeated.

5. Benedicts Test

6. Monosaccharides(monos)
The Most Important Monosaccharide Is
Glucose.
A Monosaccharide is made up of 1 sugar unit.
Monos are reducing sugars.
Fructose and Galactose are all so
Monosaccharides, They all have the same chemical
formula but different structures.

7. Three Monosaccharides
C6H12O6Hexose ; n=6

8. Disaccharide : Glycosidic Bond
This is when two monosaccharides join to form a
Disaccharide.
The reaction is similar to condensation.
The reaction involves the water been given off.
There are three types of Disaccharides:
1. Sucrose
2. Lactose
3. Maltose

9. Glycosidic Bond
Above is the
structures of a
Glycosidic bond.
It forms a
Disaccharide

10. Dehydration Synthesis
of a Disaccharide

11. Formation of Disaccharides

12. Hydrolysis
This is the breaking down of a glycosidic bond.
Instead of water been taken away water is added.
Lysis means splitting.
Hydrolysis of a Disaccharide

13. Important Polysaccharides: Starch
Consists of glucose
subunits
Plant energy storage
molecule
Glycogen is a very similar
molecule in animals.
Starch and glycogen can
be digested by animals.

14. Starch test

15. Important Polysaccharides: Cellulose
Composed of glucose
subunits
Different bond
formed than starch
Structural
component in plants
Cannot be digested
by animals

16. Review by this VDO!!!
http://www.youtube.com/watch?v=_zm_DyD6FJ0

17. Your Group Activity.

18. Your Group Result.
SAMPLE TEST RESULT
Starch Non Starch
Ex. Potato
A
B
C
D
E

19. Assignment:
Worksheet
1.1
1.2
1.3
Sent me back
in this class !!!

20. THANK YOU FOR YOU
ATTENTION !!!