Transport carrier proteins.
An amino acid is given by the general formula
R-CH(NH2)-COOH
where R group varies.
B because there are too many deer so they all can't have enough food so the die.
Nerve cells communicate by sending an electrical signal through an axon, from this molecules get released into the synapse this then binds itself onto receptor sites. With ion-linked channel receptors, the ligands get binded to a protein. The ion channels are then opened and the proccess gets repeated. Does that help?
Answer:
Either Organic or Non of the choices.
Explanation: