Number of asymmetric carbon atoms are present in glyceraldehyde.

How many of the following compounds are oligosaccharides?

$\mathrm{i}.$ Cellulose 

$\mathrm{ii}.$ Lactose

$\mathrm{iii}.$Sucrose

$\mathrm{iv}.$ Raffinose

$\mathrm{v}.$ Ribose

$\mathrm{vi}.$ Galactose

$\mathrm{vii}.$ Glycogen

$\mathrm{viii}.$ Starch

Among the following, the number of essential amino acids is______.

Arginine, threonine, valine, proline, methionine, lysine, tryptophan, serine

The total number of basic groups in the following form of lysine is_______.

$\begin{array}{c} \\ \begin{array}{c} +\\ {\mathrm{H}}_3\mathrm{N}\end{array}\begin{array}{c} \\ -{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\end{array}\end{array}\begin{array}{c}{\mathrm{NH}}_2\\ | \\ \mathrm{CH}\end{array}{\begin{array}{c} \\ \\ -{\mathrm{COO}}^{-}\end{array}}^{ }$