BIOA01H3 Chapter 2: BIOA01 Chapter 2 On Cell Eukaryotes and Prokaryotes

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Zachariah Campbell

Document Summary

Cell theory: all organisms are composed of one or more cells the cell is the basic structural and functional unit of all living organisms cells arise only from the division of pre-existing cells. Microscopy: technique for producing visible images of objects that are too small to be seen by the human eye. Microscope: instrument of microscopy with different magnifications and resolutions of specimens. Light microscopes: microscope that uses light to illuminate the specimen. Electron microscopes: microscope that uses electrons to illuminate the specimen. Magnification: the ratio of an object as viewed to its real size. Plasma membrane: a bilayer made of lipids with embedded protein molecules hydrophobic barrier selected water-soluble substances can penetrate membrane through transport protein channels. Prokaryotic cell is lacking a nucleus, instead as a region called nucleoid which contains highly folded mass of dna, which is lacking a boundary membrane separating it from the cytoplasm prokaryotic chromosome.