miocrobiology藥學英語大二下有難度啊-文庫吧
2024-12-22 14:47 本頁面
【正文】 p attachment of bacteria to other cells or surfaces， posed of polysaccharides and sometimes protein ? cell wall: prevents osmotic lysis of cell protoplast（ 原生質(zhì)體 ） and confers rigidity and shape on cells Grampositive bacteria: peptidoglycan（ 肽聚糖 ） plexed with teichoic acids（ 磷壁酸 ） Gramnegative bacteria: peptidoglycan surrounded by phospholipid， lipoprotein and lipopolysaccharide( LPS,脂多糖 ) Rogers State University 11 ? Plasma membrane: permeability barrier。 transport of solutes。 energy generation。 location of numerous enzyme systems。 posed of phospholipid and protein ? Ribosome(核糖體 ): sites of translation (protein synthesis), posed of RNA and protein ? Plasmid(質(zhì)粒 ): extrachromosomal geic material, posed of DNA ? Pili（ 菌毛 ） and Flagella（ 鞭毛 ） : Swimming movement, posed of protein Rogers State University 12 ? nucleoid： an irregularlyshaped region within the cell of prokaryotes which has nuclear material without a nuclear membrane and where the geic material is localized. Rogers State University 13 3. Virus A virus is a submicroscopic infectious agent that is unable to grow or reproduce outside a host cell. ● When independently existhave no ability of metabolism (exchange material, transfer energy, grow and reproduce )nonliving ● When be in a hosttake over control of the metabolic activities of host cell, fulfill replication Rogers State University 14 Structure Each viral particle, or virion, consists of geic material, DNA or RNA, within a protective protein coat called a capsid. Rogers State University 15 Hepatitis B virus 乙型肝炎病毒 Influenza virus 流感病毒 Rogers State University 16 Human immunodeficiency virus 人免疫缺陷病毒 SARS virus SARS 病毒 Rogers State University 17 Replication Rogers State University 18 Attachment（ 吸附 ） is a specific binding between viral
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