Polysaccharide

Question 1

What are the two types of starch glucose polymer?

Answer 1

Alpha amylose

Amylopectin

Question 2

alpha amylose and amylopectin are what type of homopolysaccharide?

Answer 2

Starch

Question 3

Starch

Answer 3

important source of CHO

repeating disacch unit is maltose

Question 4

Amylopectin

Answer 4

gives red color with iodine

Question 5

alpha amylose

Answer 5

blue-black color with iodine

Question 6

long, unbranched chains of d-glucose units linked by alpha 1,4 glycosidic bonds

Answer 6

alpha amylose

Question 7

alpha amylose

Answer 7

long, unbranched chains of d-glucose units linked by alpha 1,4 glycosidic bonds

Question 8

amylopectin

Answer 8

highly branched

glycosidic linkages joining successive glucose residues are alpha 1,4 but at the branch points are alpha 1,6

Question 9

glycosidic linkages joining successive glucose residues are alpha 1,4 but at the branch points are alpha 1,6

Answer 9

amylopectin

Question 10

what constitutes 15-20 % of starch?

Answer 10

alpha amylose

Question 11

dextrins

Answer 11

low MW weight

not fermented by yeast

used as adhesive and binder

Question 12

iodine reaction of starch

Answer 12

blue

Question 13

IR soluble starch

Answer 13

blue

Question 14

IR amylodextrin

Answer 14

purple

Question 15

IR erythrodextrin

Answer 15

red

Question 16

IR achrodextrin

Answer 16

colorless