(s) about biomolecules.

(B) is correct. Sucrose links the anomeric carbons of glucose and fructose through a glycosidic bond, so it has no free hemiacetal group and is non-reducing. Its hydrolysis gives an equimolar glucose (dextrorotatory, $+52.5^\circ$) and fructose (strongly levorotatory, $-92.4^\circ$) mixture whose net rotation is negative, so the invert sugar is levorotatory. (A) is wrong: glucose and fructose give the same osazone (and so does mannose), but galactose differs at C-4 and gives a different osazone. (C) is wrong: the $\alpha$ and $\beta$ forms of D-glucopyranose differ only at C-1, so they are diastereomers (anomers), not enantiomers. (D) is wrong: at a pH below its isoelectric point, glycine is protonated to a cation and migrates toward the cathode, not the anode.