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1. Give 5 reasons to be in favour of using embryonic stem cells.

  • ) They give one of the best chances of finding treatments for different and often serious conditions.
  • 5) Emryonic stem cells could be used to grow new tissues and organs for transplants.
  • 3) Embryos are being created from adult cells in use in research - they would never be babies
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  • The embyos used are generally spare ones from infertility treatment and would be destroyed anyway.
  • ) It may be possible to use embryonic stem cells from the umbillical cords of newborn babies.
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2. Give an example of plant cells that do not have Chloroplastsand explain why they have none.

  • Root cells do not have chloroplasts because they are underground and do not photosynthesise
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3. Are human cells the same as other animal cells?

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  • Most human cells are like most other animal cells and contain a nucleus, cytoplasm, membrane, mitochondria and ribosomes.
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4. Explain the function of ribosomes

  • Where protein synthesis takes place. All the proteins needed in the cell are made here.
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5. What are bacterial cells like?

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  • They are single celled organisms that are much smaller than animal and plant cells. DConsists of cytoplasm and a membrane surrounded by a cell wall. The genes are not in a distinct nucleus.
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