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Name the type of reaction that would break down polysaccharides into their monomers. 1
Hydrolysis reaction
Give one feature of starch and explain how this feature enables it to act as a storage substance. 2
F1. Coiled / helical / spiral
E1. So, compact / tightly packed / can fit lots into a small space
F2. Insoluble
E2. So, no osmotic effect / does not leave cell / does not affect water potential
Accept: prevents osmosis
F3. Large molecule / long chain
E3. So, does not leave cell / contains large number of glucose units
Accept: can’ t cross membranes
F4. Branched chains
E4. So, easy to remove glucose
Feature = one mark
Explanation = one mark
Note: these are independent marking points
These must be related for both marks but can be in reverse order
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