<prompt> Urea cycle linked to krebs cycle by?FumarateOxaloacetateOrnithineCitrullin  <response>: ANSWER: A FumarateREF: Harpers illustrated biochemistry 27th ed p. 246-49Arginosuccinate is converted to arginine at this step fumarate is released. At this step urea cycle cycle is linked with TCA cycle. 