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What is the starting point of the ornithine cycle?

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in Biology – Class 11 by (272k points)
What is the starting point of the ornithine cycle?

(a) Ornithine amino acid

(b) Citrulline amino acid

(c) Arginine

(d) Fumeric acid

I had been asked this question during an interview.

My question is based upon Urine Formation topic in division Excretory Products and Elimination of Biology – Class 11

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The correct choice is (a) Ornithine amino acid

The best I can explain: Ornithine amino acid is the starting point of the urea formation in the Krebs-Hanseleit cycle or the urea cycle. Ornithine and citrulline are the main amino acids of the urea formation.

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