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Edexcel A-Level Biology AS 2.13 Protein Synthesis Questions

Trace transcription and translation from DNA to mRNA and polypeptide, identify RNA polymerase, ribosome and tRNA roles, and use codon or anticodon evidence to explain protein production.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • Describe transcription and translation from a DNA gene to an mRNA and polypeptide sequence.
  • Explain mRNA, tRNA, ribosome and RNA-polymerase roles in ordering amino acids during protein synthesis.
  • Complete codon or anticodon sequences and explain how altered or targeted RNA affects protein production.

Edexcel A-Level Biology AS 2.13 Protein Synthesis Questions question 1

[Maximum number: 2]

The nature of the genetic code is important in determining the sequence of amino acids in a polypeptide chain. The diagram shows the genetic codes for each amino acid and the stop codons found in human DNA.

Figure for Question Edexcel A-Level Biology AS 2.13 Protein Synthesis Questions question 1 — Edexcel A-Level Biology AS

Question (a)

(a)

The diagram shows the sequence of bases in part of a DNA template (antisense) strand for serine and arginine. DNA template strand

Table for Question (a) — Edexcel A-Level Biology AS

mRNA

Figure for Question (a) — Edexcel A-Level Biology AS
[ 2 ]

Question (i)

(i)

Complete the diagram to show the sequence of bases in the mRNA molecule formed during protein synthesis.

[ 1 ]

Question (ii)

(ii)

Give the sequence of bases that would be found on the anticodon of a tRNA molecule that would bind to the first codon in this mRNA molecule.

[ 1 ]
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