TXST Medical Micro Exam with 100% correct solutions 2024

cell wall, flagella, pili, capsule, endospores, s-layer correct answers Bacterial structures important for pathogenesis cell wall of Gram-positive bacteria correct answers .Thick mesh like peptidoglycan layer .Contains secondary wall polymers, teichoic acid and lipoteichoic acid .May also have C- polysaccarides (e.g. M protein of Streptococci .One membrane (phospholipids and proteins) Lipoteichoic acid (weaker endotoxins) have fatty acid and anchored in in cytoplasmic membrane Inclusion bodies correct answers .Internal structures in some bacteria .Metabolite storage, useful in medical devices .Have applications (ex. poly hydroxybutyrate from Sinorhizobium meliloti, used in biodegradable plastics .in cell membrane and can store proteins and pigments periplasmic space (in gram negative cells) and outer membrane correct answers Dont allow movement across, but some small material can. region between IM and OM lysozyme correct answers Cleaves the glycan backbone of gram positive bacteria. Found in mouths and often used to gently lyse a cell Cell wall of Gram-negative bacteria correct answers .Thin peptidoglycan layer located in periplasm .Outer membrane contains LPS and proteins for transport, cell wall synthesis .Outer membrane maintains the structure and permeability barrier to large molecules (enzymes and antimicrobial .Two membranes (inner and outer) Lipopolysaccaride correct answers endotoxin found in gram negative cells on the outer membraned .made of 3 structural sections : O antigen, core polysaccharide, and Lipid A .LPS is used to classify bacteria -O antigen is 50-100 repeating units of saccharides, used for serotyping (eg E coli O 157:H7) endotoxins correct answers stimulates the immune system. what is responsible for dilation of blood vessels and elevated blood pressure during septic shock. Can stop the heart. -LPS and lipoteichoic acid