Biological reactions can be classified as being of two main types: anabolic and catabolic. Catabolic reactions involve the break down of a larger molecule to release energy and smaller molecules; meanwhile, anabolic reactions are the opposite such that they involve the combination of molecules while consuming energy to form larger molecules. Muscle growth is anabolic because polypeptides are formed using amino acids and energy.
The distance of the Goldilocks zone ensures that water on the terrestrial planet is maintained in the liquid phase. This is because the distance from the star ensure it receives enough sunlight to keep the planet warm but not too hot that the water exists as vapor. Water in its liquid form is essential for maintaining life like here on earth.
