Calculating Mitotic Index using Plant Cells (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does the mitotic index measure in a tissue sample?
What does the mitotic index measure in a tissue sample?
Proportion of cells undergoing mitosis
What does it mean that meristematic cells are totipotent?
What does it mean that meristematic cells are totipotent?
They can differentiate into any cell type
Why are root tips ideal for investigating mitotic index?
Why are root tips ideal for investigating mitotic index?
High concentration of dividing cells
What temperature should the HCl be heated to for root tip treatment?
What temperature should the HCl be heated to for root tip treatment?
60°C
What is the purpose of treating root tips with HCl?
What is the purpose of treating root tips with HCl?
Softens tissue by breaking down cell walls
Why is toluidine blue O stain used in this practical?
Why is toluidine blue O stain used in this practical?
Binds to DNA & makes chromosomes visible
If 45 cells show visible chromosomes out of 520 total cells, what is the mitotic index?
If 45 cells show visible chromosomes out of 520 total cells, what is the mitotic index?
0.087
How many cells should be counted to ensure statistical reliability?
How many cells should be counted to ensure statistical reliability?
At least 500 cells
Why should the very tip of the root (root cap) be removed?
Why should the very tip of the root (root cap) be removed?
It has fewer dividing cells
Which magnification should be used first when observing the prepared slide?
Which magnification should be used first when observing the prepared slide?
Lowest magnification