First aid usmle step 1 Study guides, Class notes & Summaries

First Aid USMLE Step 1: Biochemistry | Questions and answers | 2024/25

First Aid USMLE Step 1: Pharmacology 2023 In the Michaelis-Menten kinetics what do the following mean: Km Vmax Draw a typical hyperbolic curve on a Michaelis-Menten Plot, then draw how the addition of a competitive and non-competitive inhibitor would change the kinetics of the reaction. - ANS-*In the Michaelis-Menten kinetics what do the following mean:* Km: - the concentration of substrate at 1/2 Vmax - this is INVERSELY related to the affinity of enzyme for its substrate Vmax: ...

First Aid USMLE STEP 1- Microbiology Exam Review A+ 2023 Cell Wall Overall Picture - Compare *Gram (+) to Gram (-)* *Flagellum* on bacteria is composed of what? What is the function? - ANS-Composition: Proteins Function: motility *Pilus/Fimbria* on bacteria is composed of what? What is the function? - ANS-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 ...

2024 FIRST AID USMLE STEP 1 – VITAMINS QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS

First Aid USMLE Step 1: Biochemistry questions with complete solution 2023.2024

First Aid USMLE Step 1: Pharmacology 2023

First Aid USMLE Step 1: GI with complete solution 2023/2024

First Aid USMLE Step 1: Pharmacology

First Aid USMLE Step 1- Pharmacology (Complete) Exam 2023 Penicillin G (IV and IM) Penicillin M (oral) - ANS-*MOA:* *β-lactam*: a structural analog of D-ala-D-ala (a normal component of cell walls) which binds and inactivates bacterial transpeptidases (penicillin-binding protein, PBPs) to block peptidoglycan cross linking *Clinical use:* Bactericidal for Gram-⊕ cocci/rods, Gram-⊖ cocci (Neisseria), and spirochetes Mostly used for Gram-⊕ organisms (S. pneumoniae, S. pyogenes, A...

First Aid USMLE Step 1- Reproductive Organ Systems + Embryology 2023 Update Sonic Hedgehog Gene - ANS-Produced @ base of limbs in zone of polarizing activity Involved in patterning along anterior/posterior axis *SUMMARY: Anterior/posterior pattern* Wnt-7 Gene - ANS-Produced @ apical ectodermal ridge (thickened ectoderm @ distal end of each developing limb) Necessary for organization along dorsal/ventral axis *SUMMARY: Dorsal/ventral pattern* FGF Gene - ANS-Produced @ apical ectoderma...