biology paper 1

• cell biology: what is in a animal cell

  cell membrane, cytoplasm, nucleus, ribosomes, mitochondria
• cell biology: what is in a plant cell

  nucleus, ribosomes, cell membrane, mitochondria
• cell biology: what is in a bacterial cell

  single loop of DNA, cell wall, cell membrane, plasmids, cytoplasm
• cell biology: name all the parts of microscope

  stage, fine adjustable knob, eye piece, high and low power objective lenses, coarse adjustment knob
• cell biology: what are the 2 types of microscopes

  light and electrical
• cell biology: name the part of the cell where protein synthesis occurs

  ribosomes
• cell biology: name the part of the cell where DNA is found

  nucleus
• cell biology: name the part of the cell where aerobic respiration take place

  mitochondria
• cell biology: write down the formula used to calculate the magnification of an object

  magnification = image / real size
• cell biology: name the part of the cell which absorbs light energy for photosynthesis

  chloroplasts
• cell biology: why can ribosomes not be seen under the microscope

  they are too small
• cell biology: what term is used to describe the movement of particles from a high concentration to a low concentration

  diffusion
• cell biology: what term is used to describe the movement of particles from a high concentration to a low concentration through a semi-permeable membrane

  osmosis
• cell biology: what term is used to describe the movement of particles from a low concentration to a high concentration using energy

  active transport
• cell biology: what will happen to the mass and length of a piece of potato when it is placed into highly concentrated sugar solution

  the mass and length will decrease
• cell biology: what will happen to the mass and length of a piece pf potato when it is placed into a highly diluted sugar solution

  the mass and length will increase
• cell biology: why do root cells not contain any chloroplasts

  there is no light fro them to photosynthesise under the soil
• cell biology: explain how a sperm cell its adapted to its function

  has flagella- to swim. many mitochondria - energy for movement. enzymes in head- break down egg cells jelly coating
• cell biology: what are stem cells

  cells that have not become specialised yet
• cell biology: name 2 places where human stem cells are found

  embryonic fluid and bone marrow
• infection and response: what is a pathogen

  it is a microorganism that causes a disease.
• Types of pathogen


  • Viruses
  • Bacteria
  • Fungi
  • Protists
• Pathogens in animals


  • HIV (potentially leads to AIDS)
  • Salmonella
  • Athlete's foot
  • Malaria
• Pathogens in plants

  • Tobacco mosaic virus
  • Agrobacterium
  • Rose black spot
  • Downy Mildew
• name a required practical

  microscopes
• name a required practical

  osmosis
• name a required practical

  enzymes
• name a required practical

  food tests
• name a required practical

  photosynthesis
• infection and response: name 3 types of viral diseases

  measles HIV tobacco mosaic virus
• infection and response: what do virus do

  produce rapidly inside your body. they live inside your cells
• infection and response: how does it make your feel ill:

  this damages cells is what makes you feel ill
• infection and response: how do measles spread

  droplets in the air
• infection and response: how is HIV spread

  sexual contact
• infection and response: how is tobacco mosaic virus spread

  plants
• infection and response: name 2 bacterial diseases

  salmonella gonorrhoea
• infection and response: what is bacterial diseases

  Are cells that can infect plants and animals causing disease
• cell biology: what is a cell membrane

  allows substances in and out of of the cell
• cell biology: what is a cell wall

  contains cellulase and provides structure
• cell biology: what is ribosomes

  site of protein synthesis