MCB2004 Microbiology: Angela Muchovej Exam 2 Study Guide Questions and Actual Answers Set.

Unicellular microorganism that lacks a nucleus - Answer prokaryotic Microorganism whose growth is either stimulated by salt or requires a high concentration of salt for growth - Answer halophile The loose, gel-like covering made chiefly of polysaccharides that can be associated with virulence is a: - Answer capsule The prokaryote that is believed to have been around since the beginning of time, and live in extreme environments are grouped in the: - Answer Archaea A structure that is used to propel the organism through a fluid environment is a: - Answer flagellum A network of polysaccharide chains cross-linked by short peptides that forms the rigid part of a bacterial cell wall. - Answer peptidoglycan A biofilm is a complex association that arises from a mixture of microorganisms growing together on the surface of a habitat. - Answer True The acid fast stain is used to identify bacteria such as Mycobacterium which have a thick waxy cell wall. - Answer True Bacteria have the same kind of 80s ribosomes that mitochondria have. - Answer False Gram positive cells have an external membrane surrounding a thick layer of peptidoglycan. - Answer False The process of bringing a virus into a cell through membrane invagination and engulfment into a vesicle is: - Answer endocytosis