Biology

Analyze option A:
The primary structure of a protein is the linear sequence of amino acids. Proteins are not rigid and unchanging.
Their structure can change due to various factors such as temperature, pH, and the binding of other molecules.
The flexibility of the protein structure is actually important for its function as an enzyme, so option A is incorrect.

Analyze option B:
Proteins are not composed solely of hydrophobic molecules.
Proteins have a combination of hydrophobic and hydrophilic amino acids.
The hydrophilic amino acids are often on the surface of the protein, interacting with the aqueous environment, while the hydrophobic amino acids may be buried inside the protein or involved in other types of interactions. So, option B is incorrect.

Analyze option C:
The active site...