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Repeated USMLE Questions Step 1- 361



Q- Which of the following statements correctly describes the relative risk of a study?

A- Odds that the group with a disease was exposed to a risk factor divided by odds that the group without the disease was exposed

B- Risk of developing disease in the exposed group divided by risk in the unexposed group

C- The difference in risk between exposed and unexposed groups

D- The proportion of risk reduction attributable to the intervention as compared to a control

B- Risk of developing disease in the exposed group divided by risk in the unexposed group- A is odds ratio, C is relative risk reduction and D is absolute risk reduction



Q- Which one of the following blotting procedures is the best for studying mRNA levels?

A- Northern blot

B- Southern blot

C- Southwestern blot

D- Western blot

A- Northern blot- Remember it by SNoWDRoP South-DNA, North-RNA and West-Protein 



Q- Which of the following is the most likely rout of transmission of herpes simplex virus-1?

A- Congenital transfusion

B- Food contamination

C- Respiratory secretions and saliva

D- Sexual contact and perinatal

C- Respiratory secretions and saliva- A, Cytomegalovirus. B, Hepatitis A, D, Herpes simplex virus-2



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