General Organic

Chemistry

Quiz 16 :

Proteins: Structure and Function

Quiz 16 :

Proteins: Structure and Function

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This is a regular folding pattern in localized regions of the polypeptide backbone.
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B

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At low pH, the amino acid zwitterion reacts with hydronium (H3O+).What is the product of this acid-base reaction? img
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D

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A protein's native conformation is
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C

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Amino acids that are not synthesized in the body and must be obtained from the diet are called
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Which side chain would MOST likely be involved in hydrogen bonding?
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The carbon with the asterisk next to it is called the img
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An amino acid zwitterion has
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Which statement BEST describes the function of an enzyme in the body?
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The following compound is a(n) img
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A protein acts as a catalyst if its name ends with
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An example of this type of protein is shown below. img
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The following amino acid is classified as polar neutral.Which of the following statements best describes why it is classified this way? img I.Its side chain is not ionizable. II.It buffers a solution at pH 7. III)It is unreactive. IV)Its side chain contains a polar functional group.
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How is the following amino acid classified? img
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The following amino acid is classified as nonpolar.Which statement BEST describes why it is classified this way? img
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During acidosis of a protein, shown below, salt bridges are broken, resulting in denaturation.Which choice shows the products of acidosis? img
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Which of the following are methods of denaturing a protein?
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Physiological pH is a pH of approximately
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Hemoglobin contains iron.The iron is an example of a(n)
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Sickle-cell anemia is caused by
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The following is a description of an enzyme called superoxide dismutase.Refer to this paragraph to answer the following question. Superoxide dismutase is an enzyme that detoxifies a free radical called superoxide.This radical is responsible for causing injury during reperfusion after a heart attack, and is also thought to play a role in Parkinson's Disease.a Depending on what organism the protein is found in, it occurs either as a dimer or tetramer of identical subunits.b The subunits are mostly α-helical with some β-sheet near the C-terminus.c A metal binding site for manganese, iron, nickel or copper/zinc is composed of residues from both the N-terminus and the C-terminus.d These residues are: His-26, His-81, Asp-167, His-171.e Which statement refers to a prosthetic group?
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