I Would go with Producers, since plants take nitrogen from the soil to make amino acids, & plants are considered producers. Hope this helps :)
They are called compounds
Immunotherapy is a process where diseases are treated through the activation of the immune system. It often treats cancer.
The lowest one would have the least amount of energy
I think a frameshift mutation that occurs very early in a protein sequence would have an effect on the structure of the protein such that the primary, secondary, and tertiary structures would be altered. A frameshift mutation occurs when a protein is drastically altered because of an insertion or a deletion. Insertions and deletions cause a change in the length of a gene, which causes a shift in the codon reading frame.