Free Questions and Answers for All Medical Students all over the World
A daily contest for USMLE students and medical doctors. You post your answer in the comments box. The correct answer and explanation will be posted on the next day. A drawing on the correct answers will be made after 24 hours. The winner will earn a copy of the book “Repeated USMLE Questions for Step 1”. By Dr Ray Makar.
A 56 year old man is taken to the emergency room after having grand mal seizure during a staff meeting. He has no history of seizure but he complains lately of recurrent headaches on the morning and decrease in intensity later in the day. Laboratory investigations and imaging studies are performed. Which of these tests … Read more
As physicians, we need to know some definitions in Genetics, which are related directly to our practice and guide us to diagnose and treat many genetic disorders. These items include genome, genotype, phenotype, genetic code, gene expression, etc. Which one of the following choices describes the definition of a phenotype? A- Genetic history of an … Read more
A 48 year-old man, who visited his daughter in London last week, complains of sudden severe pain and swelling in his right leg during his flight back to the USA. He is taken to the hospital and ultrasound is performed. It reveals femoral vein thrombosis. What is the most likely contributed to this finding? A-Hypertension … Read more
A scientific researcher is classifying some drugs according to their actions on different receptors. One of these drugs binds to its receptor without producing any action. This drug should be classified as what? A-Agonist B-Antagonist C-Partial agonist D-Inverse agonist Answer When a drug binds to its receptor, it competes with other substances which normally affect … Read more
Q- A 24-year-old medical student visits her physician for a refill on her treatment of depression. She is prescribed imipramine, a tricyclic antidepressant. During the discussion of the treatment, her physician mentions that this drug mainly undergoes first-pass hepatic metabolism. The prescribed drug is most likely administered by which route? A- Intramuscular B- Intravenous C- … Read more
Q- A 19-year-old college student is brought to the emergency room by a police officer because of a cut wound on his arm. The student was arrested for committing a robbery at a convenience store. His record shows two fights with his neighbors on different occasions because he used to hit their pets. He also … Read more