Biliverdin is reduced to bilirubin by the cytosolic enzyme biliverdin reductase. Answer: A Biliverdin is composed of four pyrrole rings linked by four carbon atoms in a closed ring system. Answers B, D, and E are incorrect. Biliverdin is not generally elevated in patients with jaundice, it is not the major bile pigment found in circulation, and it is not a bile salt.

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Biliverdin Is

Question 129

Multiple Choice

Biliverdin is

A) composed of four pyrrole rings linked by four carbon atoms in a closed ring system.
B) generally elevated in patients with jaundice.
C) reduced to bilirubin by the cytosolic enzyme biliverdin reductase.
D) the major bile pigment found in the circulation.
E) a bile salt.

Correct Answer: