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Exam Code: USMLE
Exam Questions: 630
United States Medical Licensing Examination
Updated: 14 Jan, 2026
Question 1

Which of the following is the mRNA start codon in most cases? 

Options :
Answer: C

Question 2

A 67-year-old woman who has been in very good health is brought to her physician's office by her husband. He states that over the course of the past 5 years she has had difficulty recognizing her grandchildren, she has not been able to plan their daily activities, she has forgotten things left cooking on the stove, and at night she has been wandering through the house with an “absent” look on her face. She is beginning to demonstrate difficulty in recalling the names of common objects, and her speech is limited to simple two- or three-word sentences. Which of the following is the most likely diagnosis?

Options :
Answer: A

Question 3

Which of the following syndromes corresponds to: hematuria, glomerulonephritis and pulmonary dysfunction? 

Options :
Answer: D

Question 4

A 30-year-old Caucasian male with HIV/AIDS develops right-sided weakness involving his right leg. A MRI of his brain reveals multiple ring enhancing lesions within the white matter in his left frontal lobe. The most likely source of this infection in the United States is

Options :
Answer: D

Question 5

Another name for Vitamin B12 is ____. 

Options :
Answer: B

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