B1.1 Flashcards
onion cell practical
-peel layer of onion skin
-place 2 drops of iodine
-place cover slip
cheek cell practical
-swab inside of cheek and place on microscope slide
-place 2 drops of methylene blue stain
-place cover slip
examples of eukaryotes
fungi, animal, plant cells
characteristics of eukaryotes
have membrane bound organelles and DNA in a nucleus
examples of prokaryotes
bacteria
characteristics of prokaryotes
have DNA but not in a nucleus, also have plasmids and don’t have membrane bound organelles
plasmids
loops of DNA
types of electron microscopes
Transmission Electron Microscope- shows 2D images
Scanning Electron Microscope- shows 3D images
characteristics of light microscopes
maximum resolution: 0.2μm
magnification: X150000
specimens dead or alive: both
is staining needed: yes & no
image 2D or 3D: 2D
colour: natural colour
cost: cheap
characteristics of electron microscopes
maximum resolution: 0.1nm
magnification: 500000
specimens dead or alive: dead
is staining needed: yes
image 2D or 3D: 2D & 3D
colour: black and white or computer generated colour
cost: expensive
example of membrane bound organelle
mitochondria
nucleus
controls cell and contains genetic material
cytoplasm
where chemical reactions take place
cell membrane
barrier that controls what goes in and out of a cell
mitochondria
site of respiration