Pepsin is an enzyme secreted in our stomach. explain why pepsin would not function in the small intestine, which has a ph of 8.

It is because the pH in small intestine is too extreme for pepsin.

In stomach, it has a pH of around 2.0. It is the pH value of where the enzyme pepsin works the fastest and most efficient. We call pH 2.0 as the optimum temperature of pepsin.

Since enzymes are made from protein, where the conformation (shape) of them can be easily affected by extreme pH or high temperatures, if the enzyme is exposed to pH that are extreme comparing the optimum pH, the shape of the active site (where substrates are bind into) may be altered. This can affect the rate of enzymatic reaction. If the shape of active site changed so much that it can no longer bind into substrates, we call this enzyme denatured. It can no longer function.

Therefore, since pH 8.0 is very extreme to pH 2.0, pepsin would denature in such environment, causing it to lose its function.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion