Cell division 1.6

The control of cell division is just as essential for the survival of multicellular organisms as it is for the reproduction of single celled organisms.  This topic covers the movement of chromosomes in the division of eukaryotic cells by mitosis. There is a section about the control of the cell cycle and how some cells can begin dividing out of control and cause cancer. The differences between primary and secondary tumours are also included.


Key concepts

Learn and test your biological vocabulary for 1.6 Cell division using these flashcards.


Essentials - quick revision through the whole topic

These slides summarise the essential understanding and skills in this topic. 
They contain short explanations in text and images - good revision for all students.

Read the slides and look up any words or details you find difficult to understand.

Exam style question about gene mutations and cancer

Answer the question below, which addresses one application of DNA replication.
(Thanks to Catarina Gouveia and her students for the question and markscheme)

Outline how the exposure to ionising radiation, such as UV, can increase the risk of developing cancer. [5]

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Summary list for 1.6 Cell division

  • Mitosis is division of the nucleus into two genetically identical daughter nuclei.
  • Chromosomes condense by supercoiling during mitosis.
  • Cytokinesis occurs after mitosis and is different in plant and animal cells.
  • Interphase is a very active phase of the cell cycle with many processes occurring in the nucleus and cytoplasm.(including G1, S, G2).
  • Cyclins are involved in the control of the cell cycle.
  • Mutagens, oncogenes and metastasis are involved in the development of primary and secondary tumours.

Skills

  • Skill: Identification of phases of mitosis in cells viewed with a microscope or in a micrograph.(prophase, metaphase, anaphase and telophase).
  • Skill: Determination of a mitotic index from a micrograph.
  • Application: The correlation between smoking and cases of cancer.

Mindmaps

These diagram summaries cover the main sections of topic 1.6 Cell division.
Study them and draw your own list or concept map from memory.

Test yourself - multiple choice questions

This self-marking quiz contains questions covering the understandings for this topic.


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Just for fun

If you want to review key terminology and have some fun with your revision try this word shoot game Cell Division arcades game