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• Factors that affect rate of respiration are glucose, oxygen, Toxic substances and temperature
• Facts for Active respiration

  1. requires energy- in form of ATP and come in respiration
  2. If respiration cannot occur neither does active transport
  3. moves molecules for an area of low conc. to an area of high conc. this goes against the conc. gradient
• Active transport goes against the conc. gradient and needs carrier proteins.

  Carrier proteins allow chemicals to cross membranes against a concentration gradient or when the phospholipid bilayer of the membrane is impermeable to a chemical.
• Why are biological washing powders with enzymes seemed useful

  Most biological laundry detergents contain lipase and protease enzymes, both of which are found in the body. Lipases break down fats and oils, while proteases work to break down protein chains. Their ability to break down these compounds makes them excellent for stain removal.
• Specialised cells like sperm cells have many adaptations like flagellum allows the sperm cell to swim through the uterus and fallopian tube to reach the egg, lot of mitochondria to provide energy for movement and digestive enzymes at the head which are used to break a hole into the egg when the sperm reaches it