Waec Model Questions Vol1 2019 Biology Question 1

Practice practical question 1 from the 2019 Waec Model Questions Vol1 Biology examination. This question covers Cell Structure .

Waec Model Questions Vol1 2019 Biology Practical

Topic: Cell Structure

Question 1 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • BIOLOGY • practical

You are given a prepared slide of an unknown eukaryotic cell. The ocular micrometer of the microscope reads 25 divisions for the diameter of the nucleus. The ocular micrometer has been calibrated such that 1 ocular division = 0.5 µm when the microscope is set at 40× objective and 10× eyepiece (total magnification 400×).

Question Parts

( a )

Calculate the actual diameter of the nucleus in micrometres (µm).

( b )

Draw a labelled diagram of the cell as seen under the microscope, showing at least the nucleus, cytoplasm, cell membrane and one visible vacuole.

( c )

State the principal function of each structure you have labelled in part (b).

( d )

Identify two possible sources of error that could affect the measurement obtained in part (a) and suggest one way to minimise each error.

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About This Question

This is Waec Model Questions Vol1 2019 Biology Question 1. It is one of the practical questions from the 2019 Waec Model Questions Vol1 Biology examination.

The question covers Cell Structure .

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