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(a) Write Haworth structure of "Lactose"...

(a) Write Haworth structure of "Lactose".
(b) i) What are non-essential amino acids?
ii) Write Zwitter ionic structure of "glycine".
(c) Name the nitrogenous base present in RNA but not in DNA.

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(b) (i) These are the amino acids where are synthesized in our body and need not be supplied through diet.
(ii) `NH_3 -CH_2-COO^(-) " " Nylon 6,6`.
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