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Question 19N.3.SL.TZ0.10b

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.3.SL.TZ0.10b
Level SL Paper 3 Time zone TZ0
Command term Define Question number b Adapted from N/A
b.
[Maximum mark: 1]
19N.3.SL.TZ0.10b

A sequence of DNA is translated in a continuous reading frame without spaces. Each triplet of nucleotides corresponds to successive amino acids in a polypeptide. The sequence given shows part of one strand of a DNA molecule.

(b)

Define what is meant by an open reading frame.

[1]

Markscheme

a significant length of DNA that begins with a start codon and ends with a stop codon ✔

Significant length or similar phrase required

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