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Theory of Panspermia and Chemical Evolution

Which of the ...

Question

Which of the following nitrogenous substance is highly toxic?

A

Urea

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B

Uric acid

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C

Amino acid

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D

Ammonia

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Solution

The correct option is D Ammonia
Ammonia is the end product of protein metabolism. Ammonia is highly toxic and diffuses through the cell membrane extremely fast because of its high water solubility and small molecular size. The ammonia is highly toxic because it has high pH. So, it must either be metabolized or expelled immediately out of body, so, its concentration remains low in the blood.

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