structure and function

• Cytoplasm

  A jelly-like material that contains dissolved nutrients and salts and structures called organelles. It is where many of the chemical reactions happen.
• Nucleus


  Contains genetic material, including DNA, which controls the cell’s activities.
• Cell membrane


  Its structure is permeable to some substances but not to others. It therefore controls the movement of substances in and out of the cell.
• Mitochondria


  Organelles that contain the enzymes for respiration, and where most energy is released in respiration.
• Ribosomes


  Tiny structures where protein synthesis occurs.