Ijmb Model Questions Vol1 2017 Biology Question 1

Practice practical question 1 from the 2017 Ijmb Model Questions Vol1 Biology examination. This question covers Cell Structure .

Ijmb Model Questions Vol1 2017 Biology Practical

Topic: Cell Structure

Question 1 IJMB_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • practical

A prepared slide of a thin transverse section of onion epidermis has been stained with iodine solution. Using a compound microscope with a 10× ocular lens, the student selects the 40× objective lens. The microscope is equipped with a calibrated ocular micrometer in which the scale bar on the captured image measures 1.0 cm and represents 20 µm at the total magnification used. The student measures the length of a central vacuole on the image as 0.45 cm. Perform the following tasks:

Question Parts

( a )

Calculate the actual length of the vacuole in micrometres (µm).

( b )

Identify any three organelles that can be clearly observed in the slide and state one function for each.

( c )

List two possible sources of error that could affect the measurement obtained in part (a).

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This is Ijmb Model Questions Vol1 2017 Biology Question 1. It is one of the practical questions from the 2017 Ijmb Model Questions Vol1 Biology examination.

The question covers Cell Structure .

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