Carbs pt 2.1: disaccharides

Question 1

What are Monosaccharides covalently linked to one another by?

Answer 1

glycosidic bonds

Question 2

What forms a disaccharide?

Answer 2

2 monosaccharides

Question 3

Name 3 abundant disaccharides

Answer 3

maltose
sucrose
lactose

Question 4

What do disaccharides hydrolyse into and how is this done?

Answer 4

Disaccharides are also hydrolysed into their component monosaccharides through the action of specific enzymes.

Question 5

What groups can link together to cyclise a glucose molecule via internal connections?

Answer 5

C=O and C-OH

Question 6

How do separate glucose molecules link together?

Answer 6

–OH on one links with an –OH on another

Question 7

Describe the bond formed between glucose and fructose in sucrose

Answer 7

A glucose and fructose unit are joined in an α(1,2)-β-glycosidic link.

Question 8

Describe the bond formed between galactose and glucose in lactose

Answer 8

Lactose, the disaccharide of milk consists of galactose joined to glucose by a β(1,4)-glycosidic link.