Repeated USMLE Questions Step 1- Review- 344

Q- What is the most effective treatment for gastroparesis in a diabetic patient?

A- Gastric resection

B- Metoclopramide

C- Omeprazole

D- Vagotomy

B- Metoclopramide- Metoclopramide is the most effective treatment for diabetic gastroparesis because it enhances gastric emptying through its prokinetic action.

Q- Decreased production of which type of collagen may result in osteogenesis imperfecta?

A- Type I

B- Type II

C- Type III

D- Type IV

A- Type I- Osteogenesis imperfecta is caused by defective or decreased production of type I collagen, the main collagen found in bone.

Q- Which of the following correctly describes pleiotropy?

A- Increased severity of a disease in succeeding generations

B- Not all individuals with a mutant genotype show the same mutant phenotype

C- One gene contributes to multiple phenotypic effects

D- Phenotype is always the same among individuals having the same genotype

C- One gene contributes to multiple phenotypic effects- Pleiotropy occurs when a single gene influences multiple, seemingly unrelated phenotypic traits.