Neco 2020 Biology Question 1

Practice practical question 1 from the 2020 Neco Biology examination. This question covers Cell Structure .

Neco 2020 Biology Practical

Topic: Cell Structure

Question 1 NECO • 2020 • BIOLOGY • practical

A student is using a compound microscope to examine a fresh cheek cell preparation. The microscope is equipped with an ocular lens of 10\u00d7 magnification and an objective lens of 40\u00d7 magnification. The ocular micrometer has 100 divisions, each division representing 0.2\,mm on the reticle.

Question Parts

( a )

List three cellular structures that the student is likely to observe in the cheek cell preparation.

( b )

Explain why mitochondria are not visible under the conditions described.

( c )

If the cell nucleus occupies 25 divisions on the ocular micrometer, calculate the actual diameter of the nucleus in micrometres (\u03bcm). Show your working.

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About This Question

This is Neco 2020 Biology Question 1. It is one of the practical questions from the 2020 Neco Biology examination.

The question covers Cell Structure .

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