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A-Level Edexcel Biology Tangents and Instantaneous Rates

Review A-Level Edexcel Biology tangents and instantaneous rates through reaction curves, initial gradients, oxygen production and rate-unit calculations.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Biology XBI11/YBI11
Level
AS

Exam points

  • draw tangents to reaction curves and calculate instantaneous rates at stated times
  • plot mass or product against time and use the starting gradient for initial rate
  • round tangent-gradient rates to required precision with biological rate units

A.3.6—Tangents and instantaneous rates question 1

[Maximum number: 3]

The enzyme invertase breaks down sucrose into its two component monosaccharides.

Suggest how the initial rate of this reaction could be determined.

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