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USMLE Review- 2



Q- What is the correct match regarding the genetic transmission of the following diseases?

A- Duchenne muscular dystrophy- X-link dominant

B- Huntington’s disease- Autosomal recessive

C- Hypophosphatemic rickets- X-link recessive

D- Leber hereditary optic neuropathy- Mitochondrial inheritance

D- Leber hereditary optic neuropathy- Mitochondrial inheritance- Duchenne muscular dystrophy- X-link recessive- Hypophosphatemic rickets- X-link dominant- Huntington’s disease- Autosomal dominant-



Q- Which type of hypersensitivity reaction develops from Mycobacterium tuberculosis?

A- Type I

B- Type II

C- Type III

D- Type IV

D- Type IV-  A- Anaphylaxis. B- Transfusion reactions, hemolytic anemia and Goodpasture syndrome. C- Serum sickness, Arthus reaction, rheumatoid arthritis and lupus nephritis.



Q- Which one of the following medications inhibits cell wall synthesis of bacteria?

A- Aminoglycoside.

B- Carbapenem

C- Clindamycin

D- Erythromycin

B- Carbapenem- Cell Wall Synthesis Inhibitors: Penicillins, Cephalosporins, Carbapenems, Monobactams, Vancomycin, Bacitracin and Cycloserine.

Protein Synthesis Inhibitors: Aminoglycosides, Tetracyclines, Spectinomycin, Erythromycin, Lincomycin, Clindamycin and Chloramphenicol



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