Proteins & Amino Acids

The structures of proteins and polypeptides are much more complicated than I ever thought comparing to carbohydrates. Especially when studying polypeptides are the ones giving you serious headaches. But amino acids, on the other hand, is much easier. The only thing you have to do is to just memorize its parent's structures composed of CH2 on the left side, COOH on the right side, and H at the top. The rest depends on the type of amino acid you want to write then express it on the bottom and then make sure that the bond between the hydrogen, carbon and oxygen are equally to 4. And also, one thing that I had a hard time is studying DNA & RNA. Well you could say that it's easy at first because we all know from basic biology that RNA is single-stranded and DNA is double-stranded. But the further you go, your nose will bleed and must really make time to fully understand how the structures are formed and identify its phosphate group, nitrogenous base, and 5-carbon simple molecules which is very confusing most of the time. All that I can say is that I hope I can cope up with the lessons regarding this topic and understand relatively how they are formed. Thank you for viewing!