Q- A middle aged male represents with an edematous circular skin lesion of black eschar. Which of the following bacteria is the most likely the causative organism of this condition? A- Bacillus anthracis B- Pneumonitis aeruginosa C- Staphylococcus aureus D- Streptococcus viridans Q- During spermatogenesis, which type of cells enter meiosis 1 to from primary […]
usmle
Repeated USMLE Questions Step 1- 346
Q- Which one of the following medications stimulates muscarinic receptors in airways when inhaled? A- Bethanechol B- Carbachol C- Methacholine D- Pilocarpine Q- Which of the following characterizes syndrome of inappropriate antidiuretic hormone secretion? A- Euvolemic hyponatremia with continued Na excretion B- Hyperosmotic volume contraction C- Recommended treatment is desmopressin acetate and hydration D- Serum […]
Repeated USMLE Questions Step 1- 345
Q- Which one of the following medications act as bacteriostatic by inhibiting bacterial dihydrofolate reductase? A- Ciprofloxacin B- Dapsone C- Sulfamethoxazole D- Trimethoprim Q- Which of the following statements is true about innate immunity? A- Highly specific and refined over time B- Its main components are T cells, B cells and circulating antibodies C- Its […]
Repeated USMLE Questions Step 1- 344
Q- Which of the following correctly describes pleiotropy? A- Increased severity of a disease in succeeding generations B- Not all individuals with mutant genotype show the same mutant phenotype C- One gene contributes to multiple phenotypic effects D- Phenotype is always the same among individuals having the same genotype Q- Decreased production of which type […]
Pharmacology MCQs- 263
Q- Acute decrease in response to a drug after initial or repeated intake is known as which of the following drug interactions? A- Additive B- Permissive C- Synergetic D- Tachyphylactic Q- Which one of the following correctly describes nicotinic Ach receptors? A- Enzyme-linked receptors B- G-protein–coupled receptors C- Ligand-gated Na+/K+ channels Q- Which of the […]
Repeated USMLE Questions Step 2 CK- 472
Q- Which one of the following features characterizes Crohn’s disease from ulcerative colitis? A- Bloody diarrhea B- Colectomy is curative C- Continuous disease beginning at rectum and extending without skipped areas D- Perineal fissures and fistulas Q- Which of the following is the main site of action of HMG-CoA reductase inhibitors? A- Blood B- Liver […]