• Like
4.2 carbohydrates
Upcoming SlideShare
Loading in...5
×

4.2 carbohydrates

  • 563 views
Uploaded on

 

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
563
On Slideshare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
21
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. CHAPTER 4 CHEMICAL COMPOSITION OF THE CELL 4.2 CARBOHYDRATES Nur amni syazana
  • 2. C A R B O H Y D R A T E S
    • Source of energy
    • Build cell walls of plants
    • Form external skeleton of insects
    • As food storage
    • Consists of carbon,hydrogen and oxygen
    • Ratio of hydrogen atoms to oxygen atoms molecule is 2:1
  • 3. T Y P E S O F C A R B O H Y D R A T E S MONOSACCHARIDES POLYSACCHARIDES DISACCHARIDES
  • 4. M O N O S A C C H A R I D E S
    • The basic building blocks of carbohydrates
    • (monomers of carbohydrates)
    • Known as simple sugar
    • Reducing sugars
    • EXAMPLE :
          • Glucose ~ in plants and fruits
          • Fructose ~ in sweet fruits and
          • honey
          • Galactose ~ in milk
  • 5. D I S A C C H A R I D E S
    • Reducing sugars except sucrose
    • Consist of two monosaccharides
    • Complex sugars
    • EXAMPLE :
          • GLUCOSE + GLUCOSE -> Maltose (malt sugar)
          • GLUCOSE + FRUCTOSE -> Sucrose (cane sugar)
          • GLUCOSE + GALACTOSE -> Lactose (milk sugar)
    GLUCOSE + GLUCOSE ------------------->MALTOSE + WATER condensation GLUCOSE + GLUCOSE <-------------------MALTOSE + WATER hydrolysis
  • 6. P O L Y S A C C H A R I D E S
    • Combination of hundreds of monosaccharides
    • Formed by the condesation of glucose monomers
    • Do not taste sweet and do not crystallise
    • Insoluble in water
    • EXAMPLE :
            • Glycogen ~ in animal and yeast
          • ~ known as animal starch
            • Starch ~ stores in plants (rice,corn,bread,wheat)
            • Cellulose ~ form cell wall in plants
    GLUCOSE + GLUCOSE ------------------->MALTOSE + WATER hydrolysis