B5 | Mapa Mental

Dna - Making Proteins
1. Dna molecules contain a genetic code containing instructions for how to make all the proteins in your body.
  1. A-T , G-C
2. Dna is a double helix of Paired bases
3. Dna controls the production of proteins in a cell
  1. Cells make proteins by joining amino acids together
4. Proteins are made by ribosomes in the cell cytoplasm
Cell Division
1. Mitosis
  1. New cells are needed for growth and repair
  2. First the cell grows and duplicates its contents
    1. Then it splits into two by Mitosis
2. Meiosis
  1. Forms sperm or egg cells called Gametes
    1. Produces new cells that only have half the original number of chromosomes
  2. Involves TWO divisions
Animal Development
1. Have lots of cells that are specialised to do a particular job
2. Cells in an early Embryo can turn into any type of cell
3. Cloning can be used to make stem cells
4. Stem cells may be able to cure many diseases
Phototropism and Auxins
1. Phototropism is growth towards or away from light
2. Auxins are plant Growth Hormones

B5

	Creado por emilyarnfield hace más de 10 años