Q1. The two different monosaccharide units in the bacterial cell wall differ from each other in one covalent modification. What is the functionally key feature of this modification and what purpose does it serve?

Q2. A mole of an assured compound contains 207.7 g of lead and 32.00g of oxygen. Without doing any calculations, tell whether a formula Unit of a compound contains more atoms of lead or more atoms of oxygen. Explain in details.