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A-Level Edexcel Biology Rates from Linear Graphs

Review A-Level Edexcel Biology rates from linear graphs through the available evidence on calculating mean change over time with rate units.

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

Exam points

  • calculate mean rate of change from linear graph intervals with suitable units

A.3.5—Rates from linear graphs question 1

[Maximum number: 2]

Statins are used in the prevention and treatment of cardiovascular disease (CVD). Red yeast rice (RYR) is a source of food and medicine in Asia. It is produced by the fermentation of rice by yeast. Red yeast rice contains monacolin K, which is similar to a statin.

The graph shows the production of monacolin K during the fermentation of rice by yeast. Concentration of monacolin K / mg per 100 g of rice

Figure for Question A.3.5—Rates from linear graphs question 1 — Edexcel A-Level Biology AS

Calculate the mean rate of production of monacolin K in this culture, in the 45-day time period. Give your answer to two decimal places. Answer mg per 100 g of rice per day

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