WBR0507
| Author | [[PageAuthor::Gonzalo A. Romero, M.D. (Reviewed by Alison Leibowitz)(Reviewed by Serge Korjian)]] |
|---|---|
| Exam Type | ExamType::USMLE Step 1 |
| Main Category | MainCategory::Embryology, MainCategory::Microbiology, MainCategory::Pharmacology |
| Sub Category | SubCategory::Infectious Disease |
| Prompt | [[Prompt::A 2-year-old girl is brought to the pediatrician because her mother is concerned that her teeth have turned a dark shade of gray since her last check-up. The mother explains that her daughter has been developing normally, but she recently started refusing formula. She also reports that approximately 2 months ago, the child had an episode of cough and sore throat for which she gave her some left-over antibiotics she had at home. Physical exam is unremarkable except for dark gray stains apparent mostly across the front teeth. Which of the following is a property of the drug used in this patient?]] |
| Answer A | AnswerA::Prevents attachment of aminoacyl-tRNA to 30S ribosomal subunit |
| Answer A Explanation | AnswerAExp::Tetracycline |
| Answer B | AnswerB::Inhibits the formation of initiation complex |
| Answer B Explanation | AnswerBExp::Aminoglycosides |
| Answer C | AnswerC::Inhibits protein synthesis by binding to the 50S ribosomal subunit |
| Answer C Explanation | AnswerCExp::Clindamycin |
| Answer D | AnswerD::Inhibits the translocation by binding to the 23S ribosomal subunit |
| Answer D Explanation | AnswerDExp::Macrolide |
| Answer E | AnswerE::Inhibits protein elongation by blocking peptidyl-transferase |
| Answer E Explanation | AnswerEExp::Chloram |
| Right Answer | RightAnswer::A |
| Explanation | [[Explanation:: Educational Objective: |
| Approved | Approved::Yes |
| Keyword | |
| Linked Question | Linked:: |
| Order in Linked Questions | LinkedOrder:: |