1.4 Starch, glycogen and cellulose

Question 1

What is starch made up of?

Answer 1

chains of a-glucose monosaccharides

Question 2

What bonds are found in starch?

Answer 2

Glycosidic bonds

Question 3

How is starch suited for energy storage?

Answer 3

-insoluble (doesn’t effect water potential)
-large (does not diffuse out of cells)
-compact
-when hydrolysed it forms a-glucose

Question 4

Is starch found in Animals?

Answer 4

no
(a similar polysaccharide called glycogen serves the same role)

Question 5

Is glycogen found in plant cells?

Answer 5

no

Question 6

How is glycogen suited for storage?

Answer 6

-insoluble
-does not diffused out of cells
-compact
-more highly branched than starch- has more ends that can be acted on simultaneously by enzymes

Question 7

How does cellulose differ from starch and glucose?

Answer 7

made up of monomers of B-glucose rather than a-glucose

Question 8

what is celluloses purpose in a plant cell?

Answer 8

a major component of the cell walls and provides rigity to the plant cell

Question 9

How is the structure of cellulose suited to it’d function of providing support and rigidity?

Answer 9

-made up of B-glucose (form long straight, unbranched chains)
-cross linked by hydrogen bonds which add collective strength