Short Answer Type

Activation energy for the acid catalysed hydrolysis of sucrose is $6.22 \mathrm{kJ} {\mathrm{mol}}^{-1}$, while the activation energy is only $2.15 \mathrm{kJ} {\mathrm{mol}}^{-1}$ when hydrolysis is catalysed by the enzyme sucrase. Explain.

How do you explain the presence of an aldehydic group in a glucose molecule?

Which moieties of nucleosides are involved in the formation of phosphodiester linkages present in dinucleotides? What does the word diester in the name of linkage indicate? Which acid is involved in the formation of this linkage?

What are glycosidic linkages? In which type of biomolecules are they present?

Which monosaccharide units are present in starch, cellulose and glucose and which linkages link these units?

Describe the term $\mathrm{D}-$ and $\mathrm{L}-$ configuration used for amino acids with examples.

How will you distinguish $1°$ and $2°$ hydroxyl groups present in glucose? Explain with reactions.

Coagulation of egg white on boiling is an example of denaturation of protein. Explain it in terms of structural changes.