Neco Model Questions Vol1 2017 Biology Question 2

Practice practical question 2 from the 2017 Neco Model Questions Vol1 Biology examination. This question covers Cell Division .

Neco Model Questions Vol1 2017 Biology Practical

Topic: Cell Division

Question 2 NECO_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • practical

A student prepared a fresh root tip of Vicia faba (broad bean) for microscopic observation. From a single field of view, the student counted 1,200 cells, of which 48 were observed in the stages of mitosis (prophase, metaphase, anaphase or telophase).

Question Parts

( a )

Calculate the mitotic index (percentage of cells in mitosis).

( b )

If the student estimates that 5 % of the mitotic cells were missed because they overlapped with other cells, recalculate the corrected mitotic index.

( c )

Explain how the mitotic index can be used to assess the effect of a growth regulator applied to the plant, and describe the trend that would indicate inhibition of cell division.

( d )

List two possible sources of error in the preparation and counting procedure and suggest a method to minimise each error.

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About This Question

This is Neco Model Questions Vol1 2017 Biology Question 2. It is one of the practical questions from the 2017 Neco Model Questions Vol1 Biology examination.

The question covers Cell Division .

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