A-Level Edexcel Biology Arithmetic Means

Review A-Level Edexcel Biology arithmetic means through short calculations from biological datasets, including amino acid mass and cardiac-cycle timing.

Exam points

calculate arithmetic means from biological measurements and round to suitable precision

[Maximum number: 1]

Human serum albumin is a globular protein found in blood plasma.
Albumin has a molecular mass of 66300 daltons.
It consists of 585 amino acids.
At pH 7.4 albumin has over 200 negative charges on the surface of each molecule.

Calculate the mean molecular mass of an amino acid in albumin.

Give your answer to an appropriate number of significant figures.

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A.1.2—Arithmetic means question 1