Starch Glycogen Cellulose

Question 1

What is the purpose of starch and how it stores

Answer 1

Starch is a storage component found in plant it is stored as small grains in potato tubers and

Question 2

Starch structure

Answer 2

Highly branched so readily hydrolyse with enzymes so that glucose can be used for respiration
Branches and allow the chain to be highly coiled and helical so compact and a lot can be stored

Insoluble so cannot dissolve so doesn’t affect water potential of the cell and cannot move out of the cell

Question 3

Glycogen how is it stored

Answer 3

In the liver and muscles cellls as granules

Question 4

Glycogen structure

Answer 4

It is highly branched more than starch so easily hydrolysed rapidly by enzymes so can be used for respiration
It is compact so a lot can be stored
Insoluble so cannot dissolve and affect water potential of the cell or move out of the cell

Question 5

Cellulose structure

Answer 5

Long unbeanched chain
Made from beta glucose straight inbranched chain run parallel with cross linkages form hydrogen bonding and form microfibris give strength to the plant and resist pressure prevents bursting
Also allow the plant to remain turgid increasing the surface area for more photosynthesis