1. Explain why glucose C6H12O6 is considered to be a carbohydrate, whereas methanal, which also contains a carbonyl (>C=O) group and has the empirical formula CH2O is not.2. State four different major functions of polysaccharides in the human body.3. Explain how the straight chain form of solid D-glucose forms a ring structure when it is dissolved in water. (The structures of both the straight chain form and α-glucose...