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# Which substance is not present in nucleic acid?

$\begin {array} {1 1} (A)\;Cytosine & \quad (B)\;Adenine \\ (C)\;Thymine & \quad (D)\;Guanidine \end {array}$

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## 1 Answer

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Guanidine is the compound with the formula $HNC(NH_2)_2$. It is a colourless solid that dissolves in polar solvents. It is a strong base that is used in the production of plastics andexplosives. It is found in urine as a normal product of protein metabolism. Guanidine is the functional group on the side chain of arginine.
Ans : (D)
answered Mar 28, 2014

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