OCR Biology Unit 1 - Cells (Module 1)

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  • Created by: Priya
  • Created on: 10-12-12 17:38

1. What is the role of mitochondria in cells?

  • To transport substances in and out of the cell
  • The site of aerobic respiration (where ATP is produced)
  • The site of protein synthesis
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2. What are stem cells?

  • Unspecialised cells that are able to differentiate into any type of cell
  • Cells found in the stem of a plant
  • Differentiated cells that have a specific role or function

3. What are the products of meiosis?

  • One cell which is genetically identical to the parent
  • Four genetically different daughter cells
  • Two genetically identical daughter cells

4. Which of these is an example of an organ system?

  • The circulatory system
  • The tissue system
  • The breathing system

5. How do cells communicate with each other by cell signalling?

  • One cell releases a messenger molecule which then travels to another cell and binds to a receptor on its cell membrane
  • By sending mRNA in vesicles to one another
  • By moving along the microtubules in the cytoplasm
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