A-Level Edexcel Biology AS Translating Between Data Forms

A-Level Edexcel Biology AS Translating Between Data Forms
Pearson Edexcel International Advanced Subsidiary/Advanced Level in Biology, Issue 2, February 2021Biology XBI11/YBI11

Review A-Level Edexcel Biology translating between data forms through graph comments, comparisons, numerical support and evaluation of evidence limits.

How this is tested

  • translate graph results into biological conclusions with supporting numerical evidence
  • compare and contrast data series across treatments, groups or temperatures
  • evaluate graph evidence using error bars, methodology limits or missing information

Question 5(c)

[Maximum number: 4]

Dopamine, serotonin and acetylcholine are neurotransmitters in the human nervous system.

The genetically engineered E. coli was grown in a liquid culture. The concentrations of tryptophan and serotonin in the culture were measured. The graph shows the results. Concentration / a.u.

Figure for Question 5(c) — Edexcel A-Level Biology AS

Discuss the changes shown in the graph. Use the information in the question to support your answer.