Molecular Biology/Genetics USMLE Step 1 Practice Question
RNA is isolated from the rough endoplasmic reticulum of several tissues, subjected to electrophoresis, blotted, and probed with a 32P-cDNA. The results from the autoradiogram are shown below (bands present only in liver, pancreas, testes, and adipose tissue at 2.4 kb). The 32P-cDNA probe used on the blot most likely is specific for which of the following genes?
Answer choices
- ALipoprotein lipase
- BScavenger receptor SR-B1Correct answer
- CApoprotein B100
- DApoprotein B48
- EApoprotein CII
- FHepatic lipase
See the full explanation
Get the correct-answer rationale, why each distractor is wrong, the underlying mechanism, and high-yield associations — plus adaptive practice that targets your weak areas — with a free MedBoardPRO account.