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Question 17N.3.HL.TZ0.10c

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Date November 2017 Marks available [Maximum mark: 3] Reference code 17N.3.HL.TZ0.10c
Level HL Paper 3 Time zone TZ0
Command term Suggest Question number c Adapted from N/A
c.
[Maximum mark: 3]
17N.3.HL.TZ0.10c

The table shows a comparison of DNA base sequences in several yeast (Saccharomyces) genomes.

[Source: P. F. Cliften et al. (2001) ‘Surveying Saccharomyces Genomes to Identify Functional Elements by Comparative DNA Sequence Analysis’, Genome Research, 11, pp. 1175–1186. © Cold Spring Harbor Laboratory Press. Reproduced with permission.]

(c)

The yeast Saccharomyces cerevisiae was the first eukaryotic organism to have its entire genome sequenced. Suggest reasons for the choice of yeast as a study organism.

[3]

Markscheme

a. easy to grow

    OR

    easy/cheap to produce large amounts

    OR

    fast generation time

b. genomes are small/easy to manipulate

c. metabolically diverse

d. industrial applications/biopharming

e. no ethical issues «with yeast»

[Max 3 Marks]

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