(f) and (g) the stucture and function starch glycogen and ceulose molecules

How is starch made?

Man alpha glucose molecules can be joined by glycosidic bonds to form two slightly different polysaccharides (STARCH)

What kind of links does amylose have

1,4 links

What are the other properties of amylose

HELIX shape

Further stabilised by hyrdrogen bonding within the molecule

It makes it compact - which makes it insoluble

What is the function of amylose

Carbohydrate storage in plants

How is amylopectin made?

1,4 glycosidic bond between alpha glucose

How does amylopectin differ from amylose

Unlike amylose some g.b formed by condensation reaction between carbon 1 + carbon 6 on 2 glucose molecules

What are the properties of amylopectin?

Branched structure

Insoluble

How does an increase in branching helpamylopectin

Increases number of points at which glucose can be released through hydrolysis

What is the function of amylopectin

Carbohydrate storage in plants

How is glycogen made?

Alpha glucose that link together to form branched polysaccharide (glycogen)

What is a pro of glycogen being more compact

Less space is needed to store it

Animals are mobile so the compartment makes it a good storage place.

There are many free ends where glucose can be released or stored.

It speeds up process of glucose being released and stored which is good for active animals.

What are the bonding?

1,4 an 1,6 links

Highly branched

What are the other properties of glycogen

Helical shape

Insoluble

What is the function of glycogen

Carbohydrate storage in animals

How is cellulose made?

B glucose

Have to turn upside down to link

How does cellulose differ from glycogen and others?

Unable to form branches

OH is too far apart from each other so one b glucose has to turn upside down so that water can be released.

A straight chain molecule is made = cellulose

What are the properties of cellulose

1,4 glycosidic bonds

Insoluble

What is the function of cellulose?

Structural support in plant cell walls

What is the process of how fibres made?

Cellulose molecules make hydrogen bonds with each other - microfibrils - Jon together to form macro fibrils - combine= fibres

What are the properties of fibre?

Strong and insoluble

What is the function of fibre

Helps with digestive system

Used to make cell walls