Urea cycle

Urea has two amino groups, one derived from Ammonia and the other from ___________

• Fumarate

• Aspartate

• Succinate

• Oxaloacetate

Carbon atom is supplied by ___________

• Carbon dioxide

• Aspartate

• carboxylic acid

• Oxalic acid

The first 2 enzymes of urea cycle are present in

• Cytosol

• Chloroplast

• Mitochondria

• Lysosomes

CPS l of mitochondria catalyzes the condensation of Ammonia and carbon dioxide to form

• Urea

• Citrulline

• Ornithine

• Carbamoyl phosphate

Which among the following are true about first step of urea cycle?

• It consumes ADP and Pi

• It is reversible

• It is regulated by ATP

• This step consumes 2 ATP and is irreversible, and rate-limiting

_________-is synthesized from carbamoyl phosphate and ornithine by ornithine transcarbamoylase

• Orinithine aminase

• Ornithine

• Citrulline

• Argino succinate

3rd step of urea cycle involves condensation of

• Urea and aspartate

• Citrulline and Aspargine

• Citrulline and aspartate

• Aspartate and fumarate

___________ produced in the 4th step of Urea cycle enters TCA cycle

• Fumarate

• Arginite

• Aspartate

• Urea

___________ is the immediate precursor for urea

• Aspartate

• Ammonia

• Fumarate

• Arginine

Which enzyme is responsible for the regeneration of ornithine?

• Asparginase

• Ornithase

• Arginase

• Argino succinase