That would be a physical change
Answer:
Elastase.
Explanation:
Collagen, keratin, and elastin are fibrilar proteins.
Elastin is a globular protein, actually an enzyme, that breaks down proteins, such as elastin. It is a protease. In humans, there are eight different genes for the production of elastase. Elastase also has an important immunological role
.
b) some bacteria reduce nitrate ion
As the cells multiply they get slower
A) It would die as harmful substances entered the cell
