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Biochemistry · Heme
Sample itemWhat gives bilirubin its origin?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. Heme breakdown
This item reviews Heme; Heme breakdown is the best answer because it directly matches the biochemical or pathological mechanism described.
Option by option
A. DNA repair
DNA repair is unsupported by the key feature.
B. Fat oxidation
Fat oxidation is plausible but not the best answer.
C. Glucose breakdown
Glucose breakdown does not fit the stated pattern.
D. Heme breakdown (correct)
Correct. Heme breakdown fits the defining mechanism.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.