Q- Which of the following drugs is considered an ergosterol synthesis inhibitor?
A-Acyclovir
B-Ampicillin
C-Ketoconazole
D-Ritonavir
C-Ketoconazole- Ketoconazole is an antifungal medication that inhibits ergosterol synthesis, an essential component of fungal cell membranes. Acyclovir is antiviral, ampicillin is antibacterial, and ritonavir is an antiretroviral protease inhibitor.
Q- Which of the following autoantibodies is associated with diffuse scleroderma?
A- Anti-histone
B- Anti-DNA topoisomerase 1
C- Anti-SSA
D- Anti-SSB
B- Anti-DNA topoisomerase 1- Diffuse scleroderma (diffuse systemic sclerosis) is strongly associated with anti–DNA topoisomerase I antibodies, also known as anti-Scl-70. Anti-histone is linked to drug-induced lupus, Anti-SSA and Anti-SSB are associated with Sjögren syndrome.
Q- Which one of the following cell markers is unique for NK cells?
A- CD14
B- CD16
C- CD40
D- CD56
D- CD56- Natural killer (NK) cells characteristically express CD56, which is considered their most unique and defining marker. They also commonly express CD16, but CD16 is not unique to NK cells.
6 thoughts on “Repeated USMLE Questions Step 1- Review- 338”
Thank you Dr. Martin. I appreciate your feedback.
Seriously sir,
I mean seriously this type of questions, u r doing a great work by taking time to upload questions, but no offense, have some standard as per USMLE.
God bless.
Thank you Dear Dr. I wish you the best of luck in your medical career
Thank you Dr. Martin. I appreciate your feedback.
Seriously sir,
I mean seriously this type of questions, u r doing a great work by taking time to upload questions, but no offense, have some standard as per USMLE.
God bless.
Thank you Dear Dr. I wish you the best of luck in your medical career
Really nice, thanks so much
Thank you so much. I really appreciate that.
Your such a blessing to many