If NOCTURNAL ACTIVITY is one of the choices, that's your answer.
Regulation of amino acids
When amino acids are absorbed by liver cells a series of chemical reactions begins. ... The amine group is reduced to ammonia by the addition of a hydrogen atom. This process is called deamination. The non-nitrogenous portion of the molecule is converted to carbohydrates or fats.
Creating or controlling a situation by causing something to happen rather than responding to it after it has happened.
Atoms are the smallest unit of non-living things and CELLS are the smallest unit of living things.
