Which of the following statements about biogeochemical cycles is true?
a.
biogeochemical cycles are cycles involving only nonliving components.
b.
the rock cycle is a biogeochemical cycle.
c.
biogeochemical cycles are not an important part of the earth system.
d.
carbon, nitrogen, and oxygen cycles are biogeochemical cycles.
c?

Protein and polypeptide sequences can be determined by first partially hydrolyzing the protein or polypeptide followed by amino acid sequencing of the fragment pieces using the chemical degradation process known as edman degradation. determine the sequence of the initial (18-amino acid) polypeptide that produces the following five partial sequences after hydrolysis and edman degradation.