USMLE Step 1

A 48-year-old woman is taken for autopsy after she is pronounced dead. Her family found her unresponsive and the ER team performed CPR but she didn’t respond. The autopsy reveals the cause of death as internal hemorrhage from an artery close to the posterior wall of the body of the stomach due to erosion of … Read more

A 17-year-old girl visits the clinic with her mother who is concerned that her daughter had not menstruated yet and her breast had not been significantly developed. She also notes that her daughter is color blind. The girl denies any sexual relationship or using any recreational drugs. Examination reveals normally appearing girl with small non-developed … Read more

A 2-year-old boy originally from Egypt is diagnosed with anemia after he took antibiotics for the treatment of otitis media. He has two brothers and one sister. One of his brothers was diagnosed with anemia when he was two years old. His parents were given a list of food and drugs that could be associated … Read more

A 26 year old woman is brought to the emergency room due to 2-hour history of hematemesis. She was invited to a banquet at her work and she vomited twice with a considerable amount of blood. Her medical, surgical and family histories are unremarkable. She visits her dentist regularly for recurrent dental caries. She doesn’t … Read more

Gluconeogenesis is a metabolic process in which glucose is generated from non-carbohydrate carbon substrates. Which one of the following substrates does NOT share its carbon in glucose skeleton but rather contributes as an energy source for gluconeogenesis? A- Acetyl CoA B- Alpha-ketoglutarate C- Fumarate D- Oxaloacetate E- Succinyl CoA Answer Acetyl CoA is an energy … Read more