Shared Flashcard Set

Details

Carbohydrates test 4A
carbs test4a
20
Chemistry
Undergraduate 1
11/03/2008

Additional Chemistry Flashcards

 


 

Cards

Term
What is a monosaccharide?
Definition
A carb that cannot be hydrolyzed to a simpler carb
Term
What is the general formula for a carb?
Definition
CnH2nOn or (CH2On
Term
What is an aldose?
Definition
A monosaccharide containing an aldehyde group
Term
What is a keytose?
Definition
A monosaccharide containing a ketone group
Term
Name 2 common monosaccharides.
Definition
Pentose and Hexose
Term
Where is the -OH group on D monosaccharides?
Definition
The -OH on its penultimate carbon is on the right
Term
What is replaced to form an Amino sugar?
Definition
A hydroxyl is replaced with an amino group NH2
Term
Where is the anomerc carbon on an aldose normally?
Definition
C1
Term
Where is the anomeric carbon of a ketose?
Definition
C2
Term
What does Beta mean?
Definition
-OH on the anomeric carbon is on the same side of the ring as the terminal CH2OH
Term
What is a six membered hemiacetal ring called?
Definition
Pyranose
Term
What is a five-membered hemiacetal ring called?
Definition
Furanose
Term
What is mutarotation?
Definition
The change in specific rotation that accompanies the equilibration of an alpha and beta anomers in aqueous solution
Term
What does D-Glucose become when exposed to an oxidizing agent?
Definition
D-Gluconic Acid
Term
What do aldehydes oxidize to become?
Definition
Carboxylic acids
Term
Are keytones oxidized?
Definition
NO
Term
What is a ketose?
Definition
They have a ketone group on Carbon 2 and an alcohol group on carbon 1
Term
Can ketoses be reducing sugars?
Definition
Yes
Term
When ketoses ISOMERIZE, what happens?
Definition
Result is an aldehyde goup on carbon 1 thus making it a reducing sugar
Term
What yields a Uronic Acid?
Definition
Enzyme-catalyzed oxidation of the rimary alcohol at C-6 of a hexose yields a uronic acid
Supporting users have an ad free experience!