To make an ester, a hydrogen atom must be removed from the hydroxyl group (–OH) of the alcohol. The –OH portion of the acid's carboxyl group must also be removed. The hydrogren atom and the ...

Changes to the structure of DNA within fat cells may be why it is often so hard to keep weight off after you have lost it ...

The hydrophilic head is composed of a choline structure (blue ... atoms in one of the hydrocarbon (fatty acid) tails causes a slight kink on this molecule, so it appears bent.