BIOL 2051 Chapter : Micro Chp 2
Document Summary
In library on first floor at reserve desk: Microbiology: an evolving science 1st edition- call number is rx52. Size of prokaryotes: prokaryotes are generally smaller than eukaryotes, small size allows nutrients to reach all parts of cell quickly, prokaryotic cells can be as small as 0. 2 m. The smallest eikaryotic cells are 2um: _________cocci_____________- typically have diameter of 2 m, some microbiologists have proposed that bacteria smaller than 0. 2 m exist in nature, cells referred to as nanobacteria. Microscopy: simple microscopes, one lens, magnify 50 300x, compound microscopes, multiple lenses, much higher magnifictation, ones in 2051 lab magnify. Lens system of compound microscopes: condenser lens located between light source and specimen, ______focuses light rays_______________________________ up through specimen, objective lens system, closest to specimen, typical scope has 10, 40, & 100x objective lenses. In each objective are multiple lenses: ocular lens system, closest to eye, typically magnify 10x, each ocular has multiple lenses.
