In which part of the human digestive system does the breakdown of proteins begin

velocity and height

ucd e e. rr. t t t t t t. to

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?