Microscopy (Edexcel GCSE Biology): Flashcards
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When were light microscopes invented?
When were light microscopes invented?
16th century
What is the maximum magnification of light microscopes?
What is the maximum magnification of light microscopes?
1500x (1500 times)
What is the resolution limit of light microscopes?
What is the resolution limit of light microscopes?
200 nm (200 nanometres)
When were electron microscopes developed?
When were electron microscopes developed?
1930s
What do electron microscopes use to create images?
What do electron microscopes use to create images?
Beam of electrons
What is the resolution of a TEM?
What is the resolution of a TEM?
0.2 nm
How much better is TEM resolution vs light microscope?
How much better is TEM resolution vs light microscope?
Over a thousand times better
What does SEM provide?
What does SEM provide?
3D images of cell surfaces
What are cristae?
What are cristae?
Inner folds in mitochondria
What is the role of ribosomes?
What is the role of ribosomes?
Protein synthesis
What process occurs in chloroplast internal membranes?
What process occurs in chloroplast internal membranes?
Photosynthesis
What can light microscopes see?
What can light microscopes see?
Nucleus and cell membrane
Which microscope allows 3D reconstructions of cells?
Which microscope allows 3D reconstructions of cells?
Confocal laser scanning microscope
What organelles were discovered via electron microscopy?
What organelles were discovered via electron microscopy?
Lysosomes, vesicles, and ribosomes