Bio 102

Prokaryotes - Ch. 28 A) Chief distinguishing characteristics of prokaryotes be: 1. Their genetic material (DNA) is non enwrap within a membrane; it is maven bill chromosome. 2. They deprivation other membrane-enclosed organelles. 3. Their DNA is not associated with hist adept proteins. 4. Their cell skirts close to constantly contain the complex polysaccharide peptidoglycan. 5. They usually tell by binary fission. B) Prokaryotes include bacteria (eubacteria) and archaea (archaebacteria). The majority of know bacteria, including the photosynthesizing cyanobacteria, argon included in the eubacteria. C) Prokaryotic cell social organisation 1. There are a great many sizes and shapes among bacteria. around bacteria contrive from 0.2-2.0 um in diameter, and from 2-8 um in length. 2. They have a few basic shapes: spheric coccus, rod-shaped bacillus, and spiral. A. Cocci that dwell in pairs after dividing are called diplococci; those that remain in groups of quaternary are known as tetrads; those that remain in cuboid groups of eight are called sarcinae; those that contour grapelike clusters are called staphylococcus; those that remain attached in chainlike patterns are called streptococci. B. just about bacilli come out as single rods. Diplobacilli appear in pairs, and streptobacilli occur in chains. C.

Spiral bacteria have one or more twists. Bacteria that look like hack rods are called vibrios. 1) Others, called spirilla, have a spiraling shape, like a corkscrew, and fairly rigid bodies. 2) Another group of spirals are turbinate and flexible; they are called spirochetes. 3. Among the structures external to th e prokaryotic cell environ are the glycocal! yx, flagella, axial filaments, fimbriae, and pili. A. The glycocalyx can take the form of a capsule (organized and firmly attached to cell wall), or a grime layer(unorganized and loosely attached to the cell wall). 1) Capsules often cherish unhealthful bacteria from...If you want to get a copious essay, recite it on our website: OrderEssay.net

If you want to get a full information about our service, visit our page: How it works.