5.1 - Carbohydrates

Question 1

glucose

Answer 1

mono (fruits and honey)

Question 2

fructose

Answer 2

mono (fruits and honey)

Question 3

galactose

Answer 3

mono (milk and dairy products)

Question 4

maltose

Answer 4

disaccharides (barley)

Question 5

sucrose

Answer 5

disaccharides (sugar cane)

Question 6

lactose

Answer 6

disaccharides (milk and dairy products)

Question 7

starch

Answer 7

poly
-rice wheat potatoes
-storage form of carbs in plants
-major energy source

Question 8

glycogen

Answer 8

poly
-storage form of carbs in animals
-liver and muscles

Question 9

cellulose

Answer 9

poly
-major component of plant cell walls

Question 10

test for starch

Answer 10

iodine test
- brown to blue-black

Question 10

test for reducing sugar

Answer 10

Benedict’s test
- green to red ppt all +ve
-the amount of ppt proportional to amount of reducing sugars

Question 11

limitations of benedicts test

Answer 11

Can test
-monosaccharides
-disaccharides
Can’t test
-polysaccharides
-sucrose

Question 12

Test for glucose

Answer 12

glucose test paper

Question 13

functions of carbs

Answer 13

1. Energy source (monosaccharides)
2. Energy reserves
   –> glycogen for animal
   –> starch for plants
3. dietary fibre (cellulose)

Question 14

H:O

Answer 14

2:1 ( C6H12O6 )