Consider the structure and functional importance of proteins. Which one of the following statements about proteins is correct? A. A change in the tertiary structure of a protein may result in the protein becoming biologically inactive: B. Proteins with a quaternary structure will be more active than proteins without a quaternary structure. C. Two different proteins with the same number of amino acids will have identical functions. D. Denaturation will alter the primary structure of a protein.

SSCE VCE Biology Nucleic Acids and Protein Synthesis: Consider the structure and funct

Consider the structure and functional importance of proteins - VCE - SSCE Biology - Question 1 - 2017 - Paper 1

Question 1

Consider the structure and functional importance of proteins. Which one of the following statements about proteins is correct? A. A change in the tertiary structure ... show full transcript

Worked Solution & Example Answer:Consider the structure and functional importance of proteins - VCE - SSCE Biology - Question 1 - 2017 - Paper 1

Step 1

A. A change in the tertiary structure of a protein may result in the protein becoming biologically inactive:

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Answer

This statement is correct. The tertiary structure of a protein is crucial for its function. Any change in this structure, such as due to denaturation or alteration by external factors, can render the protein inactive since it may disrupt the active site required for its biological activity.

Step 2

B. Proteins with a quaternary structure will be more active than proteins without a quaternary structure.

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Answer

This statement is not universally correct. The activity of a protein is not solely determined by whether it has a quaternary structure. While many proteins require a quaternary structure for functionality, not all proteins without this structure are inactive.

Step 3

C. Two different proteins with the same number of amino acids will have identical functions.

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This statement is false. The sequence and arrangement of amino acids, not just the number, lead to different protein structures and functions. Thus, two proteins with the same number of amino acids can have entirely different functions depending on their sequences.

Step 4

D. Denaturation will alter the primary structure of a protein.

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Answer

This statement is incorrect. Denaturation affects the secondary, tertiary, and quaternary structures of proteins, but it does not alter the primary structure, which is the linear sequence of amino acids.

Consider the structure and functional importance of proteins - VCE - SSCE Biology - Question 1 - 2017 - Paper 1

Worked Solution & Example Answer:Consider the structure and functional importance of proteins - VCE - SSCE Biology - Question 1 - 2017 - Paper 1

A. A change in the tertiary structure of a protein may result in the protein becoming biologically inactive:

B. Proteins with a quaternary structure will be more active than proteins without a quaternary structure.

C. Two different proteins with the same number of amino acids will have identical functions.

D. Denaturation will alter the primary structure of a protein.

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