Glycosidic Bond Flashcards
1
Q
How are disaccharides and polysaccharides formed?
A
- 2 Hydroxyl groups on different saccharides
- Covalently bond
- Condensation reaction
- Glycosidic bond
- Oxygen links 2 molecules
- Catalysed by enzymes specific to which OH groups are reacting
2
Q
Types of glycosidic bonds between :
Maltose
Sucrose
Cellulose
Amylose
Amylopectin
A
Maltose - α 1,4
Sucrose - α 1, 2
Cellulose - β 1, 4
Amylose - α 1, 4
Amylopectin - α 1, 4 and 1, 6
3
Q
How is the glycosidic bond broken? Examples?
A
- Hydrolysis
- Catalysed by enzymes
- Digesting food, breakdown of stored carbs in muscle and liver cells for cellular respiration
4
Q
How to get a positive benidicts test from sucrose
A
- Heated with HCL
- Water hydrolyses glycosidic bond
- 2 monosaccharides test positive in benedict’s test
