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Question 18N.3.SL.TZ0.9a

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Date November 2018 Marks available [Maximum mark: 2] Reference code 18N.3.SL.TZ0.9a
Level SL Paper 3 Time zone TZ0
Command term Compare and contrast Question number a Adapted from N/A
a.
[Maximum mark: 2]
18N.3.SL.TZ0.9a

The starch found in potato tubers (Solanum tuberosum) is normally a mixture of 80 % amylopectin and 20 % amylose. The Amflora potato is genetically modified to alter this ratio. The modified potato is not suitable for human consumption but is grown for industrial uses.

(a)

Compare and contrast amylose with amylopectin.

[2]

Markscheme

a. amylopectin is «more» branched/has 1,6 bonds
OR
amylopectin is less soluble in water ✔

b. both made up of glucose
OR
both are polysaccharides
OR
both are helical in shape
OR
both contain glycosidic bonds ✔

 

Accept converse statements

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