2.1.2bcd&f)Structure & function of polysaccharides

Question 1

Beta glucose

Answer 1

Joined to other glucose- condensation reaction
Monomers form glucose
Orientation of glucose means that single straight chains are made
1-4 glycosidic bond

Question 2

Cellulose structure

Answer 2

Cellulose molecules lie parallel to each other- microfibrils formed
Straight chain is formed

Question 3

Cellulose function

Answer 3

2 OH groups & H2O is released
H bonds- strengthen cell wall

Question 4

Cellulose extra info

Answer 4

Cellulose is not permeable
Not hydrolyzed easily

Question 5

Starch: Amylose structure

Answer 5

Spirals in a chain- forms a helix
1-4 glycosidic bond
Less soluble than alpha glucose on its own

Question 6

Starch: Amylopectin structure

Answer 6

1-4 & 1-6 glycosidic bond
1-6 glycosidic bond very 25 glucose units- causes polysaccharide to be branched

Question 7

Starch function

Answer 7

Storage molecule
Polymer of alpha glucose
Helix- more compact & a more efficient storage molecule
Branches- not compact

Question 8

Starch extra info

Answer 8

INSOLUBLE- no effect on osmosis