A block in the urea cycle can result from a deficiency in any of these enzymes except:

Question

Quizplus · Accepted Answer

Glucokinase is not involved in the urea cycle, so a deficiency in this enzyme would not result in a block in the cycle. Deficiencies in the other enzymes listed can lead to a block in the urea cycle. Glucokinase is not a part of the urea cycle and therefore its deficiency will not result in a block in the urea cycle. Deficiencies in carbamyl phosphate synthetase I, arginase, and argininosuccinic acid lyase can all lead to a block in the urea cycle.

A Block in the Urea Cycle Can Result from a Deficiency