1. The figure below illustrates one level of protein structure. This structure i
ID: 206639 • Letter: 1
Question
1. The figure below illustrates one level of protein structure. This structure is held together by the bonds labeled #1. Examine this structure and use it to answer questions a-f H.H c-o c o #1 What level of primary structure is depicted above? What is the name of this structure? What type of bond holds this structure together? The bond labeled #2 is a a. b. c. d· bond. It contributes to the level of protein structure. e. Which level(s) of protein structure involve interactions between the R groups? Which of the bonds labeled above would break when exposed to extreme heat of pH changes causing denaturation of the protein? f. 2. Explain why the shape of a protein is so important.Explanation / Answer
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a) The primary strucutre consist of series of amino acids held together by covalent peptide bonds
b) This strucutre is called a beta sheet.
c) This structur eis held together by covalent peptide bond at the primary level and hydrogen bond between the chain's backbone.
d) the bond labelled #2 is a peptide bond. It contributes to the primary level of protein strucutre.
e) The interaction between R-groups takes place at the tertiary stage.
f) The bond labelled as #1 i..e., the hydrogen bond will break upon exposure to extreme heat or pH as it is weaker compare dto the covalent peptide bond (#2) and lead to denaturation. Also upon exposure to extreme heat or pH the electrostatic interaction would be disrupted leading to loss of strucuture.
g). The shape of a protein determines its function and therefore it is very crucial. For example, when a protein gets denatured, it looses its three-dimensional structure, even though the amino acid compositon and the primary strucutre remains intact. This shows how important structure is for protein function.
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