question_answer

Which one out of (a) to (d) given below correctly represents the structural formula of the basic ammo acid?

A)  \[H-\underset{\underset{O}{\mathop{\mathbf{/}}}\,\underset{\,OH}{\mathop{\mathbf{\backslash }}}\,}{\overset{N{{H}_{2}}}{\mathop{\underset{C}{\overset{\mathbf{|}}{\mathop{\underset{\mathbf{|}}{\mathop{\underset{C{{H}_{2}}}{\mathop{\underset{\mathbf{|}}{\mathop{\underset{C{{H}_{2}}}{\mathop{\underset{\mathbf{|}}{\mathop{C}}\,}}\,}}\,}}\,}}\,}}}\,}}}\,-COOH\]

B)         \[\underset{N{{H}_{2}}}{\mathop{\underset{|}{\mathop{\underset{C{{H}_{2}}}{\mathop{\underset{|}{\mathop{\underset{C{{H}_{2}}}{\mathop{\underset{|}{\mathop{C{{H}_{2}}OH}}\,}}\,}}\,}}\,}}\,}}\,\]

C)  \[H-\underset{OH}{\overset{N{{H}_{2}}}{\mathop{\underset{\mathbf{|}}{\overset{\mathbf{|}}{\mathop{\underset{C{{H}_{2}}}{\mathop{\underset{\mathbf{|}}{\mathop{C}}\,}}\,}}}\,}}}\,-COOH\]

D)         \[H-\underset{N{{H}_{2}}}{\overset{N{{H}_{2}}}{\mathop{\underset{\mathbf{|}}{\overset{\mathbf{|}}{\mathop{\underset{C{{H}_{2}}}{\mathop{\underset{\mathbf{|}}{\mathop{\underset{C{{H}_{2}}}{\mathop{\underset{\mathbf{|}}{\mathop{\underset{C{{H}_{2}}}{\mathop{\underset{\mathbf{|}}{\mathop{\underset{C{{H}_{2}}}{\mathop{\underset{\mathbf{|}}{\mathop{C}}\,}}\,}}\,}}\,}}\,}}\,}}\,}}\,}}}\,}}}\,-COOH\]