Evaluate the processes in photosynthesis and respiration that take place as a cycle of reactions . Use your understanding of specific reactions to explain why the process of producing glucose in plants is a cycle.

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.