Question

what is fischer projection

Answer 1

All nonterminal bonds are depicted as horizontal or vertical lines. The carbon chainis depicted vertically, with carbon atoms represented by the center of crossing lines. The orientation of the carbon chain is so that the C1 carbon is at the top. In an aldose, the carbon of the aldehyde group is C1; in a ketose the carbon of the ketone group has the lowest possible number (usually C2).