Urea cycle

Urea cycle occurs in

• Kidney

• Liver

• Pancreae

Amount of urea present in a healthy individual

• 10-40 mg/dl

• 10-30 mg/dl

• 15-40 mg/dl

What is the cofactor of CPS - 1

• NAC

• NAD

• NAG

Human beings are

• Uricotelic

• Ureotelic

• Ammoniotelic

Urea cycle was elucidated in

• 1930

• 1942

• 1932

The enzyme arginase require

• Co²+

• Mn²+

• None of the above

• All of the above

Rate limiting step in urea cycle

• Synthesis of arginosuccinate

• Synthesis of urea

• Synthesis of carbamoyl phosphate

Ornithine role in urea cycle is comparable to that of _______ in TCA cycle

• Fumarate

• Oxaloacetate

• Malate

Amount of urea excreted in urine

• 15-30 g/day

• 10-30 g/day

• 10-40 g/day

How many ATPs are consumed in urea cycle

• 3 ATP

• 4 ATP

• 2 ATP