Q- Which of the following organisms is associated with toxic shock syndrome due to exotoxin A?
A- Clostridium perfringens
B- Staphylococcus aureus
C- Streptococcus pyogenes
D- Vibrio cholera
Q- Which one of the following types of necrosis is most likely associated with myocardial infarction?
Q- Which of the following conditions is caused by a frameshift mutation?
A- Becker muscular dystrophy
B- Duchenne muscular dystrophy
C- Hereditary nonpolyposis colorectal cancer
D- Sickle cell disease
3 thoughts on “Repeated USMLE Questions Step 1- 337”
Thank you and have a good luck in your medical career.
Thanks all continou
first qus. whay not B ???