1. Basic Cell Structure Flashcards
Light microscopes can distinguish objects how many um’s apart?
0.2 um
Electron microscopes can distinguish objects what measurement apart?
A few nanometres
How does an electron microscope work?
- Sample stained with heavey metels.
- Beam of electrons focused be electromagnets.
- Sample blocks or reflects electron.
What are the types (2) of electron microscope?
- Scanning - detects surface electrons.
- Transmission - detects electrons passed through sample.
What organelles (5) do eukaryotes have that prokaryotes don’t?
- Nucleus.
- Mitochondria.
- Endoplasmic reticulum.
- Golgi apparatus.
- Vesicles.
How is the cytoskeleton usually imaged?
Fluorescense.
How are mitochondria usually imaged?
Electron microscope.
How are nuclei imaged?
Stained > light microscope.
How is the golgi usually imaged?
Electron microscope.
What process converts DNA to RNA?
Transcription (nucleus)
What process converts RNA to protein?
Translation (cytoplasm)
What kind of proteins remains in the cytoplasm?
Proteins made by ribosomes.
What are the moleucules (2) in ribosomes?
- RNA.
- Protein.
Where does the pathway to create extracellular proteins begin?
Endoplasmic reticulum
How is the endoplasmic reticulum usually imaged?
Electron microscope.
