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Pearson Edexcel IAL Biology 2.13 Protein synthesis

Practise tracing transcription and translation through DNA, mRNA, tRNA, ribosomes, codons, anticodons and protein products.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • complete mRNA or tRNA anticodon sequences using the DNA template or codon shown
  • describe mRNA, tRNA and ribosome roles in ordering amino acids during translation
  • explain how RNA polymerase transcribes DNA and how antisense strands can block translation

2.13—Protein synthesis 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 2.13—Protein synthesis 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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