biology mock

• label 8 organelles of a plant cell


  cytoplasm

  mitochondria

  nucleus

  ribsome

  chloroplast

  cell membrane

  cell wall

  vacole
• what function does sensory neurone do


  carry electrical signals towards the spinal cord and brain
• function of the mitochondria

  release energy
• function of the cell membrane

  controls what enters and exits cell
• calculate magnification

  magnification= actual size/image
• why dendrons and axons are usually long

  so they can carry messages up and down the body
• what is mitosis needed for

  growth and repair
• lipases break down

  lipids into fatty acids or glycerol
• what is growth 


  permanent increase in size or mass
• function of the cytoplasm

  where cell activity occurs
• function of the nucleus

  where DNA is stored
• what function does the relay neurone do

  carry nerve impulses within the central nervous system
• protease break down

  proteins into amino acids
• what are the 2 types of stem cells in humans

  human and embryonic
• label 5 organelles of an animal cell

  cell membrane

  ribsome

  nucleus

  mitochondria

  cytoplasm
• egg cell adaptation

  contains nutrients in its cytoplasm to feed embryo
• sperm cell adaptation: acrosomes (in head) that contain enzymes to break down the egg wall and contains a lot of mitochondria for energy to move
• cilliated epithelial cell adapted to its function 


  cilla are tiny hair like structures they can move substances by beating them along the surface of the tissue
• prophase is the 


  membrane around the nucleus breaks down
• prophase is a parent cell
• what is active transport 


  movement of particles across the membrane from an area of a lower concentration to any area of higher concentration this uses energy
• what is osmosis

  movement of water particles from a high to a low concentration, against concentration gradient (no energy required) through a semi permeable membrane
• what does diploid mean and give an example

  a cell that contains 2 copies of each chromosome

  example: blood cell, skin cell and muscle cell
• if 2 alleles are the same then the organisms are 


  homozygous
• chromosomes are 


  long coiled up molecules of DNA
• complementary base pairs are joined together by

  weak hydrogen bonds
• what are the 4 complementary base pairs and who they join with

  A,C,G,T

  A-T

  C-G
• sex cells are called

  gametes
• meristems are found in 


  roots and shoots
• plants have tissues called

  meristems
• function of the cell wall

  protects the cell
• stem cell disadvantages 


  lead to cancer

  ethical issues
• how is red blood cell adapted to its function

  small and flexible to fit through the blood vessels
• function of the chloroplast

  where photosynthesis occurs
• what does the central nervous system consist of

  brain and spinal cord
• enzymes are proteins which means they are made up of

  amino acids
• why are light microscopes better than electron microscopes

  -can see colour

  -can see living organisms

  -cheaper
• convert

  mm—um—nm—pm


  divide 1000
• what is the role of the myelin sneath

  to protect the axon and help speed nerve transmission
• all growth in animals happen by

  cell division