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Question 17N.2.HL.TZ0.07b

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Date November 2017 Marks available [Maximum mark: 4] Reference code 17N.2.HL.TZ0.07b
Level HL Paper 2 Time zone TZ0
Command term Distinguish Question number b Adapted from N/A
b.
[Maximum mark: 4]
17N.2.HL.TZ0.07b
(b)

Nitrogen is part of many important substances in living organisms.

Distinguish between transcription and translation.

[4]

Markscheme

a. DNA is transcribed AND mRNA is translated

Disallow the first mark, if a candidate gets transcription and translation the wrong way round, but allow marks
after that up to [3 max]

b. transcription produces RNA AND translation produces polypeptide/protein

c. RNA polymerase used in only in transcription and ribosomes only in translation

d. transcription in the nucleus «of eukaryotes» and translation in the cytoplasm

e. tRNA needed for translation but not transcription

f. nucleotides linked in transcription and amino acids in translation

   OR

   sugar-phosphate/phosphodiester bonds in transcription and peptide bonds in translation

[Max 4 Marks]