Peptidoglycan synthesis - Study guides, Class notes & Summaries

portion that anchors LPS molecule in lipid bilayer, can act as endotoxin when organism is killed & it is released into circulation (stimulate immune system to attack itself) - Lipid A Basic structure of peptidoglycan - Alternating NAG and NAM forming a glycan chain held together by terapeptide chain a thin layer of peptidoglycan surrounded by an outer membrane containing lipopolysaccharides - Gram-negative A type of dormant cell that is generally resistant to heat, dessication, UV light an...

USMLE Step 1 First Aid – Microbiology with complete solution Cell Wall Overall Picture - Compare *Gram (+) to Gram (-)* - answer *Flagellum* on bacteria is composed of what? What is the function? - answerComposition: Proteins Function: motility *Pilus/Fimbria* on bacteria is composed of what? What is the function? - answerComposition: Glycoprotein Function: Mediate adherence of bacteria to cell surface, sex plus during conjugation. *Spore* formation is ONLY possible is what type of b...

Anton van Leeuwenhok - Dutch merchant & scientist who observed live microorganisms (bacteria & protozoa) through his improved compound microscope Algae - Photosynthetic eukaryotes; can reproduce sexually or asexually; microbiologist interested in unicellular; cell wall composed of cellulose; Benefits of Microogranisms - basis of food chains in marine & freshwater environments; decomposers; important role in photosynthesis; digestion in human intestine; synthesis of Vitamin B and Vitamin K;...

A phospholipid molecule has 1. a hydrophilic head that is repelled by water. 2. hydrophilic tails that are repelled by water. 3. a hydrophilic head that is attracted to water. 4. a hydrophobic head that is repelled by water. 5. hydrophobic tails that are attracted to water. - a hydrophilic head that is attracted to water. A cell membrane is not 1. a fluid structure. 2. a rigid structure. 3. a mosaic structure. 4. a bilayered structure. 5. composed of phospholipid molecules. - a rigid ...

GMS 6121 Exam 3 Quizzes with 100% Correctly Solved Which of the following are NOT accurately described structural relationships of bacteria? a) gram positive: thick peptidoglycan and teichoic acid b) gram negative: outer membrane and LPS c) acid-fast: waxes and lipids d) wall-less: LOS and cholesterol Answer-d) wall-less do have cholesterol from the host but do not have LOS/LPS Why are gram negative bacteria resistant to bacitracin and vancomycin? a) porins b) they lack the targets for...

Straighterline Intro to Biology 101 Chapter 3 Already Passed Cell smallest unit of life Atom smallest unit of an element Molecule union of two or more atoms Tissue group of cells with a common structure and function Organ composed of tissue functioning together for a specific task Organ system composed of several organs working together Organism an individual Population organisms of the same species in a particular area Community interacting populations in a particula...

StraighterLine Micro 250 Final Prep Questions and Answers | Latest Version | 2024/2025 | 100% Verified What is the primary function of ribosomes in a cell? A) DNA replication B) Protein synthesis C) Cell division D) Energy production B) Protein synthesis Which structure is found in both prokaryotic and eukaryotic cells? A) Nucleus B) Mitochondria C) Ribosomes D) Endoplasmic reticulum 2 C) Ribosomes What distinguishes Gram-positive bacteria from Gram-negative b...

AMR Antibiotics - Exam 1 Questions and Answers 100% AccurateAMR Antibiotics - Exam 1 Questions and Answers 100% AccurateAMR Antibiotics - Exam 1 Questions and Answers 100% AccurateAMR Antibiotics - Exam 1 Questions and Answers 100% AccurateAMR Antibiotics - Exam 1 Questions and Answers 100% Accurate Penicillins - ANSWER-- Beta lactams; inhibit bacterial cell wall synthesis by binding to one or more penicillin-binding proteins (PBPs) which in turn prevents the final transpeptidation step of pept...

OpenStax Microbiology Test Bank Chapter 14: Antimicrobial Drugs * = Correct answer Multiple Choice 1. Which was the first antimicrobial agent discovered to treat syphilis? A. chloramphenicol B. compound 606* C. penicillin D. sulfonamide 2. Who is credited for first finding an antimicrobial agent? A. Paul Ehrlich* B. Alexander Fleming C. Edward Jenner D. Joseph Lister 3. Who is credited for first finding a naturally occurring antimicrobial agent? A. Paul Ehrlich B. Alexa...

Developed smallpox immunization using cowpox agent - Edward Jenner Sought a "magic bullet" to destroy pathogens & not host - Paul Ehrlich Discovered penicillin - Alexander Fleming Pioneered aseptic surgery, Prevented surgical infections by using mists of phenol - Joseph Lister Father of Epidemiology (Cholera in London) - John Snow Pioneered asepsis by discovering that hand washing prevented streptococcal infections in obstetric patients - Ignaz Semmelweis Pioneered the culti...