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Revision Homework (Cell Structures (releasing a protein (STEP 1:…

- - - - Packages and modifies proteins and makes lysosomes.
    - - contain digestive enzymes, they are kept separate from the cytoplasm by the surrounding membrane but can be used to digest invading cells or to destroy the cell when it needs to be replaced
    - - allows a cell to move or to transport substances across it's surface
    - - membrane bound organelle involved with the transport and synthesis of lipids, steroids and hormones. does not have ribosomes.
    - - help provide strength and support to the cell. it also determines the cell shape. it is involved with the movement of cells and holds organelles in place.
    - - membrane bound organelle involved with the transport and synthesis of proteins which have been made in the ribosomes, it is continuous with the nucleus.
    - - involved with separation of chromosomes during cell division. also play a role in movement of flagella
- - - - 2 rings
      - Adenine
      - Guanine
    - - 1 ring
      - Cytosine
      - thymine
    - - STEP 1: The DNA is untwisted and unzipped by DNA helicase
      - STEP 2: Free nucleotides attach to the complimentary base
      - STEP : 3 DNA polymerase joins the backbone together and forms 2 stands of DNA