Repeated USMLE Questions Step 1- Review- 359



Q- Which one of the following neoplasms is the most likely related to HIV infection?

A- Burkitt’s lymphoma

B- Hodgkin’s lymphoma

C- Kaposi sarcoma

D- Myelocytic leukemia

C- Kaposi sarcoma- Kaposi sarcoma is strongly associated with HIV infection and is caused by HHV-8. It is a classic AIDS-defining illness. The other malignancies can occur in HIV, but are not as strongly linked as Kaposi sarcoma.



Q- If the prevalence of a disease is 10%, what is the chance that randomly selected 3 persons out of this population will all have the disease?

A- 0.1

B- 0.0.1

C- 0.001

D- 0.0001

C- 0.001- If disease prevalence is 10%, the probability that one person has the disease is 0.1. For three independent individuals, the probability all three have it is: 0.1 × 0.1 × 0.1 = 0.001



Q- Conversion of ethanol to acetate will result in increase production of which of the following?

A- NAD

B- NADH

C- Oxaloacetate

D- Pyruvate

B- NADH- Ethanol is metabolized in two major steps (ethanol → acetaldehyde → acetate), and both steps use NAD⁺ and produce NADH. This leads to an increased NADH/NAD⁺ ratio, which contributes to lactic acidosis, hypoglycemia, and fatty liver.

 

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4 thoughts on “Repeated USMLE Questions Step 1- Review- 359”

  1. Thank so much Dear for visiting this page. I hope it helps you achieve your medical career.

  2. Thank you Dr. Fafa

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