Excretory Products And Their Elimination Ques 4

4. In Ornithine cycle, which one pair of the following wastes are removed from the blood?

[1996]

(a) $CO_2$ and urea

(b) $CO_2$ and ammonia

(c) Ammonia and urea

(d) Urea and sodium salts

Show Answer

Answer : b

Hints & Solutions

(b) In ureotelic animals urea is formed from ammonia by Ornithine cycle. $ CO_2+2 NH_3 \to CO(NH_2)_2+H_2 O $ $ \text{ ammonia Urea } $