Answer:
A. pH
Explanation:
Denaturation of proteins is a protein whereby the protein molecule loses its primary structure and ultimately its physical functioning as a result of factors including pH, temperature or concentration of chemicals. Based on this definition, it is visible that denaturation of proteins can be caused by these three factors: pH, chemical and temperature.
However, in this case of PEPSIN enzyme, which is a proteinous molecule produced in the stomach of humans and functions in breaking down proteins, its denaturation occurs as it moves along the digestive tract to the intestines. This is as a result of the changes in pH in the digestive tract.
The pH of the stomach where pepsin is produced is acidic i.e. <3.0. However, as one moves towards the intestine, the pH increases, which is unfavorable or considered harsh for the pepsin enzyme. Hence, it gets denatured.
The medulla oblongata is the primary respiratory control center. Its main function is to send signals to the muscles that control respiration to cause breathing to occur. There are two regions in the medulla that control respiration: ... The dorsal respiratory group stimulates inspiratory movements
it is like the brain of the cell, it controls most of what the organelles do.
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Interphase is often calledas the resting phase, not because its resting or doing nothing in but because in this phase, the cell is preparing itself for mitosis or meiosis. It is during this phase in which a cell undergoes a lot of protein synthesis and the cell grows in preparation for mitosis or meiosis
Yy is the genotype of the green pea