-The Following Is a Description of an Enzyme Called Superoxide

question 120

Multiple Choice

-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 -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 secondary structure?

• A) a
• B) b
• C) c
• D) d
• E) e

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Definitions:

Natural Immunity

The innate resistance against pathogens that an individual is born with, as a result of genetic factors or passed through maternal antibodies.

Chickenpox

A highly contagious viral disease characterized by an itchy rash and red spots, primarily affecting children.

Tetanus Toxoid

A vaccine used to provide immunity against tetanus, a serious bacterial infection.

Sterile Field

A specified area that is considered free from microorganisms.