28. Carbohydrates

Sugar groups may be added to proteins in which of the following forms of glycosylation?

Which of the following best describes glycoproteins in the context of $\mathrm{monosaccharides}$ and $N-\mathrm{glycosides}$?

Propose an acid-catalyzed mechanism by which cytosine can form a β-1 N-linkage with 2-deoxy-β-Dribofuranose to produce a deoxynucleoside (DNA) called deoxycytidine.