Carbohydrates Flashcards
1
Q
How to tell beta from alpha glucose
A
The OH is ABOVE in the B form
2
Q
Glycosidic bonds
A
Monosaccharides CONDENSE to form glycosidic bonds
Hemiacetyl + alcohol (1 and 4)
Once the hemiacytl binds it can o longer open up and is no longer a reducing sugar however the newly bonded will still have a reducing end
3
Q
What linkages are in cellulose
A
B 1-4 D glucose linear unbranched
Hydrogen bonds between parallel chains
Most abundant organic compound on earth
4
Q
What linkage in amylose
A
Alpha 1-4
5
Q
Homopolysaccharides
A
Only one type of sugar (glucose)
Starch
Cellulose
Glycogen
6
Q
Which carb doesn’t have a stereoisomer
A
Dihydoxyacetone
Ketotriose
7
Q
D glucose
A
Monosaccharides
Aldohexose
Epimers = d mannose
D galactose
Predominantly a ring structure
Different to fructose (furan)
