Repeated USMLE Questions Step 1- Review- 14

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Q- Which of the following is the mechanism of action of ciprofloxacin?

A- Inhibits bacterial protein synthesis through binding with the 30S

B- Inhibits DNA gyrase and relaxation of DNA

C- Interferes with bacterial cell wall synthesis

D- Interferes with bacterial metabolic production

B- Inhibits DNA gyrase and relaxation of DNA



Q- Which of the following is the most effective treatment of a case of an old man with benign prostatic hypertrophy (BPH)?

A- Doxazosin

B- Finasteride

C- Doxazosin and finasteride

D- Propranolol

C- Doxazosin and finasteride- This is the most effective treatment to avoid complications such as urinary retention.



Q- Food allergies typically cause which one of the following immunologic abnormalities?

A- Cell-mediated hypersensitivity

B- Complement activation

C- Immune-complex deposition

D- Localized anaphylaxis

D- Localized anaphylaxis- Food allergy is a form of type 1 hypersensitivity which is characterized by local reaction on the skin and/or gastrointestinal tract. It is caused by a reaction of allergen with IgE bound to mast cells.

 

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Dr Ray Makar
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4 thoughts on “Repeated USMLE Questions Step 1- Review- 14”

  1. This is the way it is. Good luck Dr Omondi.

  2. Thank you so much this is a good knowledge instilled in our brain

  3. Thank you so much Dr Adam for your feedback. This is encouraging me to post more questions.

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