1.4 starch, glycogen & cellulose Flashcards
1
Q
where is starch found?
A
plants as small grains
2
Q
name the 5 features of starch & explain.
A
branched -> many ends for attack & reapid release of alpha-glucose
insoluble -> doesn’t affect water potential
large -> doesn’t diffuse out
coiled -> into helix, compact
hydrolysed -> into alpha-glucose for respiration
3
Q
where is glycogen found?
A
- animal & bacterial cells (muscles & liver)
4
Q
what is the difference between glycogen & starch? why?
A
- shorter & more branched; animals need energy release at a faster rate
5
Q
which type of glucose forms starch & glycogen?
A
alpha-glucose
6
Q
which type of glucose forms cellulose?
A
beta-glucose
7
Q
what is the difference between starch & cellulose?
A
chains are straight & unbranched, parallel to each other
8
Q
what is formed between adjacent chains of cellulose?
A
cross-links by hydrogen bonds to create a strong structure
