Skip to content

Course home

Sign up

Cell division, cell diversity and cellular organisation

EasyMedium
1234567891011121314151617181920212223242526
Question 12

An oncologist is studying HeLa cell cultures using high-resolution confocal microscopy to model cell volume changes during the cell cycle.

Cell X is a spherical cell in early G1 phase with a radius of 7.2 μm7.2\text{ }\mu\text{m}7.2 μm.

Cell Y is a dividing cell approximated as a cylinder of length 38 μm38\text{ }\mu\text{m}38 μm and radius 6.4 μm6.4\text{ }\mu\text{m}6.4 μm.

a.

State the stage of mitosis during which chromosomes line up individually along the equator (metaphase plate) of the cell.

[1]
b.

Calculate the volume of the spherical Cell X. Use the formula:

volume of sphere=43πr3 \text{volume of sphere} = \frac{4}{3}\pi r^3 volume of sphere=34​πr3

Give your answer in standard form to 2 significant figures, in μm3\mu\text{m}^3μm3.

[2]
c.

Calculate the volume of the cylindrical Cell Y. Use the formula:

volume of cylinder=πr2h \text{volume of cylinder} = \pi r^2 h volume of cylinder=πr2h

Give your answer in standard form to 2 significant figures, in μm3\mu\text{m}^3μm3.

[2]
Markscheme

Cell division, cell diversity and cellular organisation Questions

  1. A Level
  2. /Biology
  3. /Cell division, cell diversity and cellular organisation

40 exam-style questions on OCR A A Level Biology Cell division, cell diversity and cellular organisation. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank