First Aid USMLE STEP 1: Microbiology Questions and Answers 100% Correct

Cell Wall Overall Picture - Compare *Gram (+) to Gram (-)* *Flagellum* on bacteria is composed of what? What is the function?Composition: Proteins Function: motility *Pilus/Fimbria* on bacteria is composed of what? What is the function?Composition: Glycoprotein Function: Mediate adherence of bacteria to cell surface, sex plus during conjugation. *Spore* formation is ONLY possible is what type of bacteria? Why is the formation of spores important/beneficial? What is the composition of a spore?Gram Positive Only Function: Resistant to dehydration, heat, and chemicals. Composition: Keratin-like coat; dipicolinic acid; peptidoglycan. *Capsule* will be composed of what on bacteria? What is the benefit of a capsule?Function: Protects against phagocytosis Composition: Organized, discrete polysaccharide layer (except Bacillus anthracis, which contains d-glutamate) GlycocalyxFunction: Mediates adhera