Proteolysis is the breakdown of proteins into smaller polypeptides or amino acids. Uncatalysed, the hydrolysis of peptide bonds is extremely slow, taking hundreds of years. Proteolysis is typically catalysed by cellular enzymes called proteases, but may also occur by intra-molecular digestion.
I'm pretty relatively sure that the answer is A.
A) They are all made of cells
Answer:
D) to break down oxygen entering the respiratory system
Explanation:
Because the function of mucus in the nasal cavity is warm, moisturize and filter air entering
