Recalled USMLE Questions Step 1- 3

Q1- A middle aged male represents with an edematous circular skin lesion of black eschar. Which of the following bacteria is the most likely the causative organism of this condition?

A- Bacillus anthracis

B- Pneumonitis aeruginosa

C- Staphylococcus aureus

D- Streptococcus viridans





Q2- During spermatogenesis, which type of cells enter meiosis 1 to from primary spermatocytes?

A- Primordial germ cells

B- Spermatids

C- Type A spermatocytes

D- Type B spermatocytes





Q3- Which type of bias is reflected when individuals with severe disease are uncovered because they die first?

A- Confounding bias

B- Late-look bias

C- Measurement bias

D- Selection bias





Answer

Q1- A-Bacillus anthracis

Q2- D-Type B spermatocytes

Q3- B-Late-look bias