A conjugated molecule such as a glycoprotein consists of
- A. two identical monomers joined together
- B. a protein combined with a non-protein group
- C. a lipid combined with another lipid
- D. a polysaccharide broken into monosaccharides
Explanation
Conjugated molecules are built from two different classes of biological molecule joined together, so a glycoprotein is protein plus carbohydrate and a lipoprotein is protein plus lipid. The cell surface is coated with such molecules, and they are what allow cells to recognise one another. Two identical monomers joined together would simply be a dimer of a single class.