Sugars

Question 1

what are the two types of sugars

Answer 1

monosaccharides and disaccharides

Question 2

whats a hexose sugar

Answer 2

a monosaccharide with 6 carbon atoms in each molecule

Question 3

what are monosaccharides

Answer 3

monomers that make carbohydrates

Question 4

examples of monosaccharides

Answer 4

glucose
fructose
galactose

Question 5

what are the types of glucose

Answer 5

alpha and beta

Question 6

a-glucose and b-glucose are …

Answer 6

isomers (same molecular formula but different structural formula)

Question 7

how are disaccharides formed

Answer 7

when two monosaccharides join via condensation reactions

Question 8

whats the bond called that forms when two monosaccharides join

Answer 8

glycosidic bond

Question 9

how is maltose made

Answer 9

alpha + alpha

Question 10

glucose + fructose = ….

Answer 10

sucrose

Question 11

how is lactose formed

Answer 11

glucose + galactose

Question 12

describe the test for reducing sugars

Answer 12

-heat sample with benedict’s reagent
- if sample stays blue > no reducing sugar present
- if sample forms green>yellow>orange>brick red ppt > reducing sugar present

Question 13

describe test for non reducing sugars

Answer 13

• heat sample with dilute HCL and then neutralise with sodium hydrogen carbonate
• heat with benedict’s reagent
• if sample stays blue > no non reducing (or reducing) sugar present
• if sample forms green>yellow>orange>brick red ppt > non reducing sugar present