Neco 2023 Biology Question 1

Practice practical question 1 from the 2023 Neco Biology examination. This question covers Cell Structure .

Neco 2023 Biology Practical

Topic: Cell Structure

Question 1 NECO • 2023 • BIOLOGY • practical

You are given a slide of a peeled epidermal layer of an onion leaf. Using a compound microscope at 400× magnification, you observe rectangular cells. You record the length and width of five randomly selected cells as shown in the table below (values in µm).

Question Parts

( a )

Calculate the mean length and the mean width of the five cells.

( b )

Assuming each cell is a rectangular prism with a uniform thickness of 10 µm, calculate the average volume of a cell using the mean dimensions obtained in part (a).

( c )

Using the average dimensions, calculate the surface‑area‑to‑volume ratio (SA:V) of a typical cell. (Surface area = 2(lw + lh + wh); volume = l × w × h)

( d )

Explain why a relatively high SA:V ratio is advantageous for the metabolic activities of a plant cell.

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About This Question

This is Neco 2023 Biology Question 1. It is one of the practical questions from the 2023 Neco Biology examination.

The question covers Cell Structure .

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