Ijmb Model Questions Vol1 2024 Biology Question 1

Practice practical question 1 from the 2024 Ijmb Model Questions Vol1 Biology examination. This question covers Cell Structure .

Ijmb Model Questions Vol1 2024 Biology Practical
Topic: Cell Structure
Question 1 IJMB_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • practical

You are given a prepared slide of an onion epidermal cell that has been stained with iodine. The microscope available has an ocular lens of 10× and objective lenses of 4×, 10× and 40×. An ocular micrometer is fitted to the eyepiece; each division on the micrometer corresponds to 0.01 mm on the stage micrometer. Using the 40× objective, you are to observe the cell and record measurements.

Question Parts

( a )
State the total magnification at which the cell is being observed.
( b )
Identify three distinct structures that are clearly visible in the preparation and give a brief function for each.
( c )
You measured the length of the same cell in three separate fields of view, obtaining 45, 48 and 46 micrometer‑scale divisions respectively. Calculate the average cell length in micrometres (µm).
( d )
Discuss two possible sources of error that could affect the accuracy of your length measurement.

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Ijmb Model Questions Vol1 2024 Biology Question 1. It is one of the practical questions from the 2024 Ijmb Model Questions Vol1 Biology examination.

The question covers Cell Structure .

View More Ijmb Model Questions Vol1 2024 Biology Questions More Ijmb Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support