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Question 18N.2.SL.TZ0.5b

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Date November 2018 Marks available [Maximum mark: 4] Reference code 18N.2.SL.TZ0.5b
Level SL Paper 2 Time zone TZ0
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 4]
18N.2.SL.TZ0.5b
(b)

Outline the reasons for differences between the proteomes of cells within a multicellular organism.

[4]

Markscheme

a. all the genome is the same in all the cells of an organism  ✔

b. the genome/DNA/genes instructs the production/expression of proteins/proteome ✔

c. the proteome is all the proteins produced by a cell ✔

d. the proteome varies with the function/location/cell differentiation/environmental conditions of the cell ✔

e. specific genes are expressed/turned on/off in different cells ✔

f. «turning on/off» according to a required function ✔

Accept a specific example (eg: insulin only produced in pancreas)

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