life Flashcards
mrs grenc
move
resp
sense
growth
reprod
excrete
nutrition
control
what do mitochondria do
found in cytoplasm
performs aerobic respiration
cell wall
prevents lysis from absorbing water
freely permeable
supports cell structure
vacuole
contains sap which is a reservoir of water, sugar and minerals
also keeps the cell structure rigid
types of light microscope
Compound LM - 2D image
Dissecting LM - 3D image
types of electron microscopes
Transmission EM- 2D image
Scanning EM- 3D image
how do EM microscopes work
use a beam of electrons which bounce off of a still (dead) object
produce BLACK AND WHITE image
what is DNA
a large chromosome which controls cell activity
plasmid
a small circle of DNA containing additional genes
Found in bacteria not animals/plants
prokaryotes
unicellular
lack nuclei
includes bacteria
ribosome
where proteins are made using amino acdis
slime capsule
protects the cell from digestion by other organisms
what do ciliated cells do
catch particles and pathogens flowing through the bronchus and bronchioles
diffusion
net movement of particles down their concentration gradient
diffusion in agar jelly practical
-cut out 3 cubes of phenolphthalein alkaline jelly (1x1, 1.5x1.5, 2x2)
[phenolphthalein is colourless in acid]
-fill beaker with acid
-add cubes to acid
-stir until SMALLEST cube has fully lost pink colour
-measure size of pink spot left in cubes
(shows that high sf area = fast rate of diffusion)
