Carbohydrates 2

Question 1

Glycosidic Bond

Answer 1

Bond formed b/w the anomeric carbon of a monosaccharide and an alcohol

Question 2

What molecule catalyzes the formation of gycosidic bonds?

Answer 2

Glycosyltransferases

Question 3

What are the 3 common disaccharides?

Answer 3

Maltose
Sucrose
Lactose

Question 4

Reducing sugars

Answer 4

Sugars that react

Question 5

Under basic conditions what can happend to an open chain ketose?

Answer 5

it can tautomerize into an aldehyde

Question 6

Is sucrose a reducing sugar?

Answer 6

No

Question 7

Is maltose a reducing sugar?

Answer 7

No

Question 8

Is glucose a reducing sugar?

Answer 8

yes because it has a free aldehyde gorup

Question 9

Is fructose?

Answer 9

Yes

Question 10

What is glycogen

Answer 10

A homopolymer made solely of glucose units

Question 11

How is glycogen bonded

Answer 11

It is made of mostly alpha 1,4 glycosidic bonds but has branches that are formed by alpha 1,6 glycosidic bonds

Question 12

What are the two forms of starch?

Answer 12

Amylose and amylopectin

Question 13

Amylose

Answer 13

unbranched linear

alpha 1,4 glycosidic bonds

Question 14

Amylopectin

Answer 14

branched

one alpha 1,6 linkage per 30 alpha 1,4 glycosidic bonds

Question 15

What does aplha-amylase do?

Answer 15

An enzyme secreted by the salivary glands and pancrease that rapidly hydrolizes glycogen, amylose, and amylopectin

Question 16

Cellulose

Answer 16

unbranched

beta 1,4 glycosidic bonds

Question 17

3 features of cellulose

Answer 17

Long straight chains
H bonds b/w parallel chains
Rigid structure