cells

• Cytoplasm


  A solvent in which chemical reactions take place.
• Vacuole


  Contains cell sap a weak solution of sugar and salt.
• Ribosomes 


  These are where proteins are made in the cell.
• Nucleus 


  Contains genetic material that controls the activities of the cell.
• Cell Wall 


  Made of cellulose. It supports the cell and strengthens it.
• Cell membrane 


  Holds the cell together and controls what goes in and out.
• Chloroplast 


  A chloroplast is a part of a cell that contains chlorophyll. It uses sunlight to make food for the plant through a process called photosynthesis.
• Mitochondria 


  Where aerobic respiration takes place and they release energy into cells.
• Animal Cell 


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• Plant Cell


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• Bacteria cell 


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• Formula for magnification


  Size image divided by real size of object x magnification
• What does Mitosis do?

  It helps make sure that every cell which divides carries the same genetic information.
• Where is DNA located?

  Inside chromosomes.
• Each section of chromosomes...

  code for the production of a particular protein called a gene.
• How many chromosomes does the human body have?

  46 (23 pairs)
• Why do cells divide?

  When an organism grows.

  When an organism becomes damaged and cells need repair.
• Steps of the cell cycle

  What happens.

  A) Step 1

  B) Step 2

  C) Step 3

  
• Stems cells


  Stem cells are cells which have not undergone differentiation meaning that they are not specialised for a specific function.
• Embryonic Stem Cells


  Stem cells which are removed from the embryo.
• Where are adult stem cells located?

  • brain
  • eyes
  • blood
  • bone marrow
• What cn stem cells be helped to treat?

  Diabetes and paralysis.
• Where are stem cells located in plants?

  Meristems
• Where are meristems located?

  They are found close to the tip of the root.
• What can meristems be used for ?


  They can be used to make clones of the plant quickly and cheaply.