Answer:
Pepsinogen is produced by chief cells and is activated by hydrochloric acid secreted by parietal cells.
Explanation:
Pepsinogen is a proenzyme produced in the chief cells (that are located in the stomach lining) that, when gets activated, is transformed into pepsin - a peptidase with the function to degrade proteins into amino acids.
The reason why pepsinogen is released inactive is that it would break down all of the cell's proteins because of its proteolytic nature. For this reason, it is released as a proenzyme and gets activated when reaches the acidic environment provided by the hydrochloric acid secreted by the parietal cells, also in the stomach lining.
Answer:
the science of breeding and caring for farm animals.
Explanation:
b. commensalism
d. coyote is at the top of that chain so it gets the least energy
c. mistletoe is a parasite. the other options aren't symbiotic relationships
Answer:
Size
Explanation:
All DNA is the same charge, It is ONLY size.
