________is a union of glucose and galactose.

Which of the following statements are true? i) Rhamnose and deoxyribose are carbohydrates by their chemical behavior but cannot represented as hydrates of carbon ii) Formaldehyde and acetic acid do not behave like carbohydrate but can be represented by the general formula of carbohydrates, C_x(H_2O)_y iii) Raffinose on hydrolysis gives glucose and galactose only iv) Polysaccharides are also called non-sugars v) In disaccharides, if reducing groups of monosaccharides are bonded, they are non reducing in nature vi) Sorbose is an example of aldose

Give the open chain and ring structures of glucose and account forthe existence of glucose In two anomeric forms.

The ring structures of glucose and fructose in invert sugar are :

The enzyme which catalyse the conversion of glucose to ethanol is

D-glucose is obtained in two different forms, alpha -D- glucose and beta -D- glucose, depending on how we crystallise it. Repersent the structure of alpha - D glucose.