Flashcards in Sugars ~ 3.1.2 Deck (10):
What are monosaccharides?
The simplest sugars, the building blocks of carbohydrates.
What do carbohydrates contain?
What is glucose?
A hexose sugar. There are two types of glucose:
~ alpha (α)
~ beta (β)
The two types of glucose have the H and OH groups reversed.
What is a disaccharide made of?
Two monosaccharides joined together.
How are disaccharides formed?
Monosaccharides are joined together by condensation reactions ~ a glycosidic bond forms between the two monosaccharides as a molecule of water is released.
What is the bond in a disaccharide?
What is sucrose?
A disaccharide formed from a condensation reaction between glucose and fructose.
What is lactose?
A disaccharide formed from a glucose molecule and a galactose molecule.
What is the Benedict's test for reducing sugars?
~ Add Benedict's reagent (which is blue) to a sample
~ Add heat in a water bath
~ If reducing sugars are present the sample forms brick red precipitate (or green or yellow or orange)