Question

an enzyme that has been subjected to an extremely salty environment
○ is fully functional.
○ has reduced functionality.
○ has increased functionality.
○ has increased solubility.

Explanation:

Enzymes are proteins with specific three - dimensional structures (including the active site) that are crucial for their function. Extreme salt conditions can disrupt the ionic bonds and other non - covalent interactions that maintain the enzyme's tertiary and quaternary structures. This disruption, called denaturation, causes the enzyme to lose its specific structure, including the active site. Without a properly shaped active site, the enzyme can't bind to its substrate effectively, so its functionality is reduced. A fully functional enzyme would not be the case here as the extreme salt has affected it. Increased functionality is incorrect because the harsh environment harms the enzyme. Increased solubility is not related to the functional impact of salt on enzymes; in fact, extreme salt can sometimes cause proteins to precipitate, and the main effect is on function, not solubility.

Answer:

has reduced functionality.