Carbohydrates (3.1.2) Flashcards
what are monosaccharides?
the monomers from which larger carbohydrates are made
what are examples of monosaccharides?
glucose, galactose and fructose
what does a condensation reaction between two monosaccharides do?
form a glycosidic bond
how are disaccharides formed?
from the condensation of two monosaccharides
what is maltose?
a disaccharide formed from the condensation of two glucose molecules
what is sucrose?
a disaccharide formed from the condensation of a glucose molecule and a fructose molecule
what is lactose?
a disaccharide formed from the condensation of a glucose molecule and a galactose molecule
what are isomers?
two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties
what are the isomers of glucose?
alpha glucose and beta glucose
what is the key difference between alpha and beta glucose?
in alpha glucose, the carbon 1 hydroxyl points below the plane but in beta glucose it points above
how are polysaccharides formed?
from the condensation of many glucose units
what does the condensation of alpha glucose form?
glycogen and starch
what does the condensation of beta glucose form?
cellulose
what is a reducing sugar?
a sugar which can donate an electron to another molecule
what are examples of reducing sugars?
all monosaccharides and some disaccharides (maltose and lactose)