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Figure 7 shows the mean distance between centromeres and the poles (ends) of the spindle during mitosis - AQA - A-Level Biology - Question 6 - 2021 - Paper 1
Question 6
Figure 7 shows the mean distance between centromeres and the poles (ends) of the spindle during mitosis. Calculate the rate of movement of the centromeres during ph... show full transcript
Worked Solution & Example Answer:Figure 7 shows the mean distance between centromeres and the poles (ends) of the spindle during mitosis - AQA - A-Level Biology - Question 6 - 2021 - Paper 1
Step 1
Calculate the rate of movement of the centromeres during phase E.
Answer
To determine the rate of movement of the centromeres during phase E, we first need to identify the mean distance between the centromeres and the poles at the beginning and end of phase E from the graph in Figure 7.
- At approximately 1800 seconds, the mean distance is around 15 μm.
- At approximately 2500 seconds, the mean distance is about 4 μm.
Next, calculate the change in distance:
Then, calculate the time taken for this change:
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Now, convert time from seconds to minutes:
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Finally, calculate the rate of movement:
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When rounded to three decimal places, the answer is approximately 1.286 μm minute⁻¹.