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Embed code for: Session XVIII (FA 15)
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Monosaccharide review, disaccharides, reactions of CHO's, common CHO's, polysaccharides, variations of CHO's, and practice questions.
CHEM 108 SI
Session XVIII – 10/29/15
SI Leader: Cassidy Sloot
Exam 3 Review
Thursday, November 5rd
4-6pm @ Ag. Engineering 100
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SD State CHEM 108 SI
Reactions of CHO’s
Convert L-glucose and L-fructose into their D forms.
Convert D-glucose and D-fructose into their cyclic forms.
What type of bonds connect single sugar units to form disaccharides?
α -1,4 down
β -1,4 up
What type of reaction occurs to form glycosidic bonds?
Dehydration (hemiacetal + alcohol)
What functional group on carbohydrates can become oxidized?
Aldehyde ( carboxylic acid)
Can all carbohydrates become oxidized?
No; aldoses only
What is a reducing sugar?
Contains an aldose capable of being oxidized
Monosaccharide or disaccharide?
Type of glycosidic linkage
Reducing or non-reducing sugar
Main function or source
Aldose or ketose
Hexose or pentose
How many chiral C’s
Amylose & amylopectin
List some examples of molecules similar to carbohydrates, but which contain atoms other than C, H, O.
T/F: Sucrose is a reducing sugar.
I have no idea!
Using the carbohydrates provided, draw the structure of lactose.
What type of glycosidic bonds exist in cellulose?
α -1,4 only
β -1,4 only
α -1,6 only
α -1,4 & α -1,6
I have no idea!