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True or false.
Oxidation of a molecule (the
electron donor) is always accompanied by reduction of a second molecule
(the electron acceptor).
True or false.
Many biologic oxidations can take place without the participation of molecular oxygen,
Free energy changes can be expressed in terms of ______ potential.
The _______ is proportionate to the tendency of reactants to donate or accept electrons.
free energy change
However, for biologic systems, the redox potential (E′0) is normally expressed at pH 7.0, at which pH the electrode potential of the hydrogen electrode is -0.42 V.
What are the 4 groups of oxidoreductases?
Oxidases catalyze the removal of hydrogen from a substrate using oxygen
as a hydrogen acceptor. They form ______ or _______ as a
_______ is a hemoprotein widely distributed in many tissues, having the typical heme prosthetic group present in myoglobin, hemoglobin, and other cytochromes.
Cytochrome oxidase is aka
amino acid oxidase
2 main functions of dehydrogenase
1. Transfer of hydrogen from one substrate to another in a coupled
2. Transfer of electrons in the respiratory chain of electron transport
from substrate to oxygen
______ defined as the removal of electrons and ______ as the gain of electrons.
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