Which of the following is TRUE regarding heme proteins?
(I)Heme groups are capable of transferring electrons across large distances provided that some molecular network exists as a "path."
(II)Heme groups are often buried in protein structure because the protein protects the heme and prevents it from indiscriminately transferring electrons.
(III)The rate of electron transfer from a reduced heme is physiologically significant.
(IV)Heme groups are often differentiated by their absorption spectrum.
A)I,III
B)I,III,IV.
C)I,II
D)II,IV
E)I,II,III,IV

Question

Quizplus · Accepted Answer

Heme proteins have several key characteristics: (I) Heme groups can indeed transfer electrons across distances if there is a molecular pathway, facilitating processes like respiration and photosynthesis. (II) Heme groups are typically buried within protein structures to protect them and prevent uncontrolled electron transfer, which could generate harmful radicals. (III) The electron transfer rate from reduced heme is significant for physiological functions, impacting processes like oxygen transport and enzymatic reactions. (IV) Heme groups can be distinguished by their unique absorption spectra, which is crucial for their identification and study in various biological contexts.

Which of the Following Is TRUE Regarding Heme Proteins