Which among the following is incorrect about different saccharides?

How are essential amino acids obtained?

What is abrin?

An amino acid is a substituted __

How many distinct components does each nucleoside contain?

The distinct components of nucleotides are phosphate group, heterocyclic compound and polysaccharide. True or false?

What percentage of the total cellular mass is nucleic acids?

Which bond is hydrolyzed to convert a disaccharide into monosaccharides?