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A-Level Edexcel Biology Order-of-Magnitude Calculations

Review A-Level Edexcel Biology order-of-magnitude calculations through microscope images, scale bars, unit conversions and standard-form answers.

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

Exam points

  • calculate magnification from microscope images using scale bars and unit conversions
  • give biological size or magnification answers in standard form or significant figures
  • work backwards from magnification to actual cell, organelle or tissue dimensions

A.1.8—Order-of-magnitude calculations question 1

[Maximum number: 1]

Female mosquitoes feed on the blood of other animals to promote the development of their eggs. During this process, infected mosquitoes can transmit the Plasmodium parasite.

The Plasmodium parasite causes the disease malaria.
The photograph shows a female Anopheles mosquito.

Figure for Question A.1.8—Order-of-magnitude calculations question 1 — Edexcel A-Level Biology AS
Figure for Question A.1.8—Order-of-magnitude calculations question 1 — Edexcel A-Level Biology AS

Calculate the magnification of the Anopheles mosquito in this photograph.

Give your answer to one decimal place.

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