Level 3

Consider the following sequence for aspartic acid:

The $\mathrm{pI}$ (isoelectric point) of aspartic acid is:

The dipeptide, $\mathrm{Gln}-\mathrm{Gly},$ on treatment with ${\mathrm{CH}}_3\mathrm{COCl}$, followed by aqueous work up, gives:

The reaction of $\mathrm{D}-$glucose with ammoniacal ${\mathrm{AgNO}}_3$ produces:

Cellulose, upon acetylation with excess acetic anhydride/ ${\mathrm{H}}_2{\mathrm{SO}}_4$ (catalytic), gives cellulose triacetate, whose structure is

Which of the list shown below have the correct pair of the structure of alanine in $\mathrm{pH}$ ranges $2-4$ and $9-11$ is

I. ${\mathrm{H}}_3\stackrel{+}{\mathrm{N}}-\mathrm{CH}\left({\mathrm{CH}}_3\right){\mathrm{CO}}_2\mathrm{H}$

II. ${\mathrm{H}}_2\mathrm{N}-\mathrm{CH}\left({\mathrm{CH}}_3\right){\mathrm{CO}}_2^{-}$

III. ${\mathrm{H}}_3\stackrel{+}{\mathrm{N}}-\mathrm{CH}\left({\mathrm{CH}}_3\right){\mathrm{CO}}_2^{-}$

IV. ${\mathrm{H}}_2\mathrm{N}-\mathrm{CH}\left({\mathrm{CH}}_3\right){\mathrm{CO}}_2\mathrm{H}$

The compound which does not contain chiral carbon atom is

Which one of the following is a typical example of a zwitterions?

Which of the following compounds in an imino acid?