Zusammenfassung der Ressource
Cells
1.1.1
- Microscopy
- Light
Microscope
- Resolution
- 200nm
- Magnification
- x1500
- Staining
- Possible
Anmerkungen:
- simple colour
stain
- specimen alive
- Inexpesive
- Resolution
- 'The degree to which it is
possible to distinguish between
two objects very close together'
(Higher resolution = Greater
detail)
- Magnification
- 'The degree to which a size
of an image is larger than
the object itself'
- Magnification= image size/object size
- Electron microscopes
- Transmission
Electron Microscope
(TEM)
- Resolution
- 0.2nm
- Magnification
- x500 000
- Staining
- Fixed/stained
- Specimen dead
- Scanning
Electron
Microscope
(SEM)
- Resolution
- 0.2nm
- Magnification
- x100 000 +
3D Images
- Staining
- Metal coated
- Reflect electrons
- Specimen dead
- Expensive
- ~Be able to recognise and
describe drawing and
photographs of cell
structures...This takes
practise!!~
- Organelles
- Nucleus
- Largest organelle
- Contains
Chromatin
- Consists of DNA and
proteins
- Instructions for
making proteins
- Surrounded by
double membrane
nuclear envelope
- with nuclear
pores
- Nucleolus
- very dense
- Makes RNA and
ribosomes
- Endoplasmic recticulum (ER)
- Rough
- Covered in
Ribosomes
- Smooth
- Lipid
processing
- Flattened
membrane sac
- Golgi Apparatus
- Receives
proteins from
ER
- Modifies proteins
- Packaged into Vesicles
- Transported to
cell surface to
be secreted.
- Also releases
lysosomes
- Mitochondria
- Aerobic
Respiration
- inner membrane
folds in
- Cristae
- Matrix
- Lysosome
- Enter text here
- Plasma Membrane
- PARTIALLY PERMIABLE
- controls movement of
substances in and out of
cell
- Phospholipid bilayer
- Chloroplasts
- Found in plant
cells
- Where
photosynthesis
takes place
- Cytoskeleton