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2.1 Supplying the cell

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Question 32

A researcher examines cells from the growing tip of a pea root.

Chromosome movement lasts 0.75 hours during a cell cycle that lasts 15 hours. The sample contains 600 cells at random points in the cell cycle.

Assume that the proportion of cells showing chromosome movement is equal to the proportion of the cell cycle spent on chromosome movement.

Estimate the number of cells in the sample that will show chromosomes moving to opposite ends of the cell.

[1]
A

202020 cells

B

303030 cells

C

404040 cells

D

450450450 cells

Markscheme

2.1 Supplying the cell Questions

  1. GCSE
  2. /Biology
  3. /2.1 Supplying the cell

194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.

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