Question

question 7

which statement best describes the connection between protein structure and function?

protein macromolecules are made of amino acid monomers.
there is no connection between structure and function
the active site of denatured enzymes no longer binds to substrates.
proteins function best within certain ph ranges.

Explanation:

Analyze the question prompt

The question asks for the statement that best describes the connection between protein structure and function.

Evaluate each option

• Option 1: "Protein macromolecules are made of amino acid monomers." This describes protein composition, not the direct connection between its three-dimensional structure and its functional activity.
• Option 2: "There is no connection between structure and function." This is scientifically incorrect; a protein's function is entirely dependent on its specific three-dimensional shape.
• Option 3: "The active site of denatured enzymes no longer binds to substrates." This directly illustrates the connection: when the structure (shape of the active site) is altered (denatured), the function (binding to substrates) is lost.
• Option 4: "Proteins function best within certain pH ranges." While true, this describes environmental conditions affecting function rather than directly illustrating the structural-functional relationship itself as clearly as the denaturation example.

Select the best option

Option 3 is the most direct and accurate illustration of how a change in structure leads to a change in function.

Answer:

• Protein macromolecules are made of amino acid monomers.
• There is no connection between structure and function
• The active site of denatured enzymes no longer binds to substrates. (Correct answer)
• Proteins function best within certain pH ranges.