Carbohydrates

1
Carbohydrates

• Disaccharides
• Polysaccharides

2
Important Disaccharides

• Maltose Glucose Glucose
• Lactose Glucose Galactose
• Sucrose Glucose Fructose

3
Maltose
?

• ? -1,4-glycosidic bond
• ?- D-Maltose

4
Lactose

• ? -1,4-glycosidic bond
• a-D-Lactose

?
5
Sucrose
a, ?-1,2- glycosidic bond
6
Learning Check C4

• Identify the monosaccharides in each of the
  following
• A. lactose
• (1) glucose (2) fructose (3) galactose
• B. maltose
• (1) glucose (2) fructose (3) galactose
• C. sucrose
• (1) glucose (2) fructose (3) galactose

7
Solution C4

• A. lactose
• (1) glucose and (3) galactose
• B. maltose
• (1) glucose and (1) glucose
• C. sucrose
• (1) glucose and (2) fructose

8
Polysaccharides

• Starch
• Amylose
• Amylopectin
• Glycogen
• Cellulose

9
Polysaccharides

• Polymers of D-Glucose

10
Amylose

• Polymer with a-1,4 bonds
• a-1,4 bonds

11
Amylopectin

• Polymer with a-1,4 and a-1,6 bonds branches
• a-1,6 bond
• a-1,4 bonds

12
Cellulose

• Polymer with ß-1,4 bonds
• ß-1,4 bonds

13
Learning Check C5

• Identify the polysaccharide in each as
• starch 2) glycogen 3) cellulose
• A. B. C.

14
Solution C5

• 3) cellulose 1) starch 2)
  glycogen