Neco 2023 Biology Question 2

Practice practical question 2 from the 2023 Neco Biology examination. This question covers Cell Division .

Neco 2023 Biology Practical

Topic: Cell Division

Question 2 NECO • 2023 • BIOLOGY • practical

You are investigating the rate of cell division in the root tip of a fast‑growing bean plant (Phaseolus vulgaris). A fresh root tip is fixed, stained and squashed. Under a microscope at 1000× magnification you examine 200 cells and record the number of cells in each stage of mitosis as shown below.

( a )

Calculate the mitotic index (MI) using the formula MI = (Number of cells in mitosis / Total observed cells) × 100.

( b )

Determine the percentage of cells in each mitotic stage (relative frequency) and present the data in a table.

( c )

Based on the percentages obtained, identify which mitotic stage is longest in duration and justify your answer.

( d )

Discuss two possible sources of error that could affect the accuracy of the mitotic index you have calculated.

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This is Neco 2023 Biology Question 2. It is one of the practical questions from the 2023 Neco Biology examination.

The question covers Cell Division .

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