Question

question 9
the toxic superoxide ion is converted to harmless oxygen by two enzymes, ______.
a superoxide dismutase and hydrogen peroxidase
b catalase and hydrogen peroxidase
c superoxide dismutase and catalase
d superoxide dismutase and oxidase
e catalase and oxidase

Explanation:

Superoxide dismutase converts superoxide ions (\(O_2^-\)) to hydrogen peroxide (\(H_2O_2\)) and oxygen (\(O_2\)). Catalase then converts hydrogen peroxide (\(H_2O_2\)) to water (\(H_2O\)) and oxygen (\(O_2\)). Hydrogen peroxidase is not involved in this two - step conversion of superoxide ion to harmless oxygen. Oxidase is also not part of this specific two - enzyme sequence for converting superoxide ion to harmless oxygen.

Answer:

C. superoxide dismutase and catalase