In the metabolism of amino acids for energy, what is the fate of the amino group?
a. excreted as urea
b. burned for energy
c. stored in the liver
d. converted to glucose

In the metabolism of amino acids, they are broken down. Their components are used as a fuel source for the cells or used in the production of fatty acids. Then, they are stored in the adipose tissue or fat.

b. Burned for energy 

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affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.