Final answer:
Proteins may denature when placed in non-homeostatic conditions, losing their functional shape and thus their ability to catalyze reactions. Denaturation can be reversible, allowing the protein to regain function, but sometimes it's irreversible, causing permanent loss of function.
Step-by-step explanation:
If a protein is placed in an environment that is outside of its homeostatic range, it will likely denature, subsequently disrupting the chemical reaction it catalyzes. This denaturation process involves a change in the protein's three-dimensional structure, which is crucial for its function. As proteins denature, they lose their specific shape necessary for binding to substrates or carrying out their roles as enzymes. In more extreme cases, these changes could be irreversible, leading to permanent loss of function.
Common physical or chemical changes that can cause denaturation include shifts in temperature, pH level fluctuations, and exposure to harsh chemicals. It is important to note that some proteins may refold back to their functional shape if the denaturing agent is removed, a process often assisted by proteins called chaperones.