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Pearson Edexcel IAL Biology 2.12 Gene as a DNA base sequence

Practise linking DNA base sequences to amino acid sequences, allele differences, and why genes do not account for all base pairs.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • define a gene as a DNA base sequence coding for a polypeptide amino acid sequence
  • compare peptide sequences to infer similarities and differences in coded amino acids
  • explain how allele base-sequence differences can change proteins or phenotypes

2.12—Gene as a DNA base sequence question 1

[Maximum number: 1]

Cystic fibrosis is an inherited recessive disease caused by mutations in a gene on chromosome 7.

Give the meaning of the term gene.

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