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Repeated USMLE Questions Step 1- 340

Q- At which of these vertebral levels does the trachea bifurcate?

A- Seventh cervical

B- First thoracic

C- Fourth thoracic

D- Sixth thoracic

C- Fourth thoracic



Q- Which of the following differentiates Dubin-Johnson syndrome from Rotor syndrome?

A- Black pigmentation of the liver

B- Conjugated hyperbilirubinemia

C- Level of liver enzymes

D- Mode of inheritance

A- Black pigmentation of the liver



Q- Which one of the following proteins surrounds the nuclear envelope?

A- Actin

B- Enkephalin

C-Tropomyosin

D-Vimentin

D-Vimentin



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