Meat and other types of tough food
It includes killing bacteria and storing partially digested food
The chemicals, neurotransmitters are released to carry a nerve impulse which is an electric signal transmitted by the nervous system. This impulse transmitted from one neuron to another. Examples of neurotransmitters are serotonin in which scientists thinks that a low level of this is one of the causes of depression.
Answer:
If the macromolecule is not lipid, then IT'S CARBOHYDRATE