Consider the following statements about the structure of proteins - VCE - SSCE Chemistry - Question 5 - 2012 - Paper 1
Question 5
Consider the following statements about the structure of proteins.
1. The primary structure of a protein is determined by the sequence of amino acid residues.
2. T... show full transcript
Worked Solution & Example Answer:Consider the following statements about the structure of proteins - VCE - SSCE Chemistry - Question 5 - 2012 - Paper 1
Step 1
only 1 and III are true.
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Answer
This statement is false. The first statement is correct as the primary structure is indeed determined by the sequence of amino acids. However, statement III is misleading because the tertiary structure is determined by interactions among all the side chains, not just between them.
Step 2
only 1 and II are true.
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Answer
This statement is correct. The primary structure is determined by the sequence of amino acids (statement I), and the secondary structure is formed through hydrogen bonds between the NH and CO groups of the backbone (statement II).
Step 3
only II and III are true.
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Answer
This statement is incorrect. Statement II is true while statement III is ambiguous for not correctly explaining tertiary structure as it also involves many types of interactions, including hydrophobic interactions and ionic bonds.
Step 4
I, II and III are all true.
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Answer
This statement is incorrect as well. While statements I and II are true, statement III does not accurately encapsulate what defines the tertiary structure of proteins.
