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Carbohydrates
Carbohydrates
60
Biochemistry
Undergraduate 2
02/03/2014

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Cards

Term
Basic Carbohydrate Types
Definition
Monosaccahrides, Disacchardies, Oligosaccharides, Polysaccharides
Term
Monosaccharide examples
Definition
Glucose, fructose
Term
Monosaccharide
Definition
one sugar molecule
Term
Disaccharide examples
Definition
sucrose, lactose
Term
Disaccharide
Definition
two monosaccharides linked together
Term
Glycosidic bond
Definition
Linkage between two monosaccharides which forms a disaccharide
Term
Oligosaccharide
Definition
three to ten monosaccharides linked by glycosidic bonds
Term
Polysaccharide examples
Definition
starche, glycgoen, cellulose
Term
Polysaccharide
Definition
chains of linked monosaccharide units
Term
What are monosaccharides composed of?
Definition
carbon, hydrogen, oxygen
Term
What is the basic formula of a monosaccharide?
Definition
(CH2O)n n=any integer between 3-7
Term
What chemical modifications can monosaccharides contain?
Definition
amino and phosphate groups
Term
What functional groups can a monosaccharide contain?
Definition
Ketone carbonyl and an Aldehyde carbonyl
Term
What is a monosaccharide with a ketone carbonyl group called?
Definition
Ketose
Term
What is a monosaccharide with an aldehyde carbonyl group called?
Definition
ALdose
Term
What does a ketone carbonyl group consist of?
Definition
COH
Term
What does a aldehyde carbonyl group consist of?
Definition
C=O + R-OH
Term
How do you determine D vs L isomerism?
Definition
The direction of the hydroxyl group attached to the second to last carbon of the molecule.
Term
Which way does a dextrorotary isomer rotate?
Definition
clockwise
Term
which way does a levorotatory isomer rotate?
Definition
counterclockwise
Term
Which form are most common sugars in?
Definition
D-isomer
Term
What is the most important sugar in the human body?
Definition
glucose
Term
Is glucose an aldose or a ketose?
Definition
aldose
Term
Under physiological conditions, glucose exists in a....
Definition
cyclic hemiacetal form
Term
What carbons bind to form the cyclic hemiacetal form of glucose?
Definition
the C5 hydroxyl with the C1 aldehyde group
Term
How do the isomers of glucose differ?
Definition
The location of the -OH on the acetal carbon, C-1
Term
What else if fructose called?
Definition
levulose, fruit sugar
Term
The sweetest of all sugars is...
Definition
fructose
Term
Is fructose a ketose or an aldose?
Definition
Ketose
Term
The principal sugar found in mammalian milk is...
Definition
galactose
Term
Is galactose an aldose or ketose?
Definition
aldose
Term
How do glucose and galactose differ?
Definition
The orientation of one hydroxyl group
Term
What sugars have only five carbons?
Definition
Deoxyribose and ribose
Term
Is deoxyribose a aldose or ketose?
Definition
aldose
Term
Is ribose a ketose or aldose?
Definition
aldose
Term
What reagent would oxidize the aldehyde groups of aldoses?
Definition
Benedict's reagent
Term
What is Bendedict's reagent?
Definition
Alkaline copper (II) solution
Term
All monosaccharides and disaccharides except ________ are reducing sugars
Definition
sucrose
Term
What is the most important reduced sugar?
Definition
deoxyribose
Term
How is a glycosidic bond formed?
Definition
The reaction of an anomeric -OH with another anomeric -OH to form an alcohol or sugar
Term
How is maltose formed?
Definition
A 1,4 glycosidic linkage between two alpha-D-glucose molecules
Term
What kind of sugar is maltose?
Definition
a malt sugar
Term
What sugar is formed as an intermediate in starch hydrolysis?
Definition
maltose
Term
Why is maltose a reducing sugar?
Definition
Due to the hemiacetal hydroxyl
Term
What sugars make up lactose?
Definition
Beta-D-galactose to alpha-D-glucose
Term
What glycosidic bond makes up latcose?
Definition
Beta-1,4
Term
What kind of sugar is lactose?
Definition
a milk sugar
Term
Which sugar is non-reducing?
Definition
sucrose
Term
How is sucrose formed?
Definition
Linking a Alpha-D-glucose with a Beta-D-fructose
Term
What is the glycosidic linkage between sucrose?
Definition
1,2 linkage
Term
What are other names for sucrose?
Definition
Table sugar, cane sugar, beet sugar
Term
What are the monosaccharides?
Definition
glucose, fructose, galactose, deoxyribose, ribose
Term
What are the disaccharides?
Definition
maltose, lactose, sucrose
Term
What is a starch?
Definition
storage form of glucose found in plants
Term
_______ are polymers of a alpha linked glucose
Definition
Starches
Term
If the links in a starch are only 1,4 the polymer is a....
Definition
amylose
Term
If the links in a starch are both 1,4 and 1,6 the polymer is a...
Definition
amylopectin
Term
If the polymer is an amylose the structure is...
Definition
linear
Term
If the polymer is an amylopectin the structure is...
Definition
branched
Term
_____ is a linear homopolymer composed of B-D-glucose units linked Beta-1,4
Definition
Cellulose
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