Adehydration synthesis reaction is best described as a chemical reaction in which

A dehydration synthesis reaction is best described as a chemical reaction in which small reactants combines to form larger molecules with loss of water.

Explanation:

When small molecules acts as reactants to form larger compounds with the loss of water molecules, we called this kind of reaction a "synthesis reaction". These reactions are typicall in biological systemas, when monomers combines to form polymers. For example, two aminoacids reacting to form a dimer, constitutes a synthesis reaction.

in 1972 the fluid—mosaic membrane model of membrane structure was proposed based on thermodynamic principals of organization of membrane lipids and proteins and available evidence of asymmetry and lateral mobility within the membrane matrix [s. j. singer and g. l. nicolson, science 175 (1972) 720–731].

the supermassive black hole is in the middle of the galaxy.