What does dehydration synthesis involve?

Dehydration synthesis is a biochemical process in which two molecules are joined together while simultaneously removing a water molecule. This process typically involves the removal of two hydrogen atoms and one oxygen atom, resulting in the formation of a covalent bond between the two molecules. This is a common mechanism in the formation of complex molecules, such as carbohydrates, proteins, and lipids, where smaller subunits (monomers) are linked together to form larger structures (polymers).

In this context, option C correctly describes the process, as the removal of 2 hydrogens and 1 oxygen during dehydration synthesis is essential for linking the monomer units together, forming new chemical bonds without extra water being present. This contrasts with other options that do not accurately depict the mechanism of dehydration synthesis. The other choices relate to aspects not pertinent to the synthesis or formation of bonds through this specific process.