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 Cell Structure and Function: 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. A change in this structure can lead to a loss of biological activity, as the active site's shape may change, preventing substrate binding.

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 necessarily true. While quaternary structure can enhance the functionality of some proteins through cooperative interactions, it does not universally imply increased activity for all proteins compared to those with only primary, secondary, or tertiary structures.

Step 3

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

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Answer

This statement is incorrect. Proteins can have the same number of amino acids but differ in sequence and structure, which directly influences their function. Therefore, two proteins with the same number of amino acids can perform entirely different roles in biological processes.

Step 4

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

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Answer

This statement is false. Denaturation typically affects the secondary, tertiary, and quaternary structures of a protein, but not the primary structure, which consists of the 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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