does the main element assist in any kind of repair?
Yes, it can repair oxidative DNA damage by mechanisms that are analogous to those occurring in the cell nucleus.
Mitochondrion
Mitochondria can repair oxidative DNA damage by mechanisms that are analogous to those occurring in the cell nucleus.
where is the mitochondria located in an animal cell UNANSWERABLE what is the main topic in discussion? Mitochondrion. what is it's structural composition? They contains outer and inner membranes composed of phospholipid bilayers and proteins, that have different properties. Because of this double-membraned organization, there are five distinct parts to a mitochondrion. what does the first membrane mentioned consist of? It contains large numbers of integral membrane proteins called porins. and what does the other membrane consist? It contains more than 151 different polypeptides, and has a very high protein-to-phospholipid ratio. what is the functionality of the main topic in discussion? The most prominent roles of mitochondria are to produce the energy currency of the cell, through respiration, and to regulate cellular metabolism. does it have any co-relation with calcium? The concentrations of free calcium in the cell can regulate an array of reactions and is important for signal transduction in the cell. Mitochondria can transiently store calcium, a contributing process for the cell's homeostasis of calcium.
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Mitochondrion [SEP] DNA repair
Mitochondria can repair oxidative DNA damage by mechanisms that are analogous to those occurring in the cell nucleus. The proteins that are employed in mtDNA repair are encoded by nuclear genes, and are translocated to the mitochondria. The DNA repair pathways in mammalian mitochondria include base excision repair, double-strand break repair, direct reversal and mismatch repair. Also DNA damages may be bypassed, rather than repaired, by translesion synthesis. Of the several DNA repair process in mitochondria, the base excision repair pathway is the one that has been most comprehensively studied. Base excision repair is carried out by a sequence of enzymatic catalyzed steps that include recognition and excision of a damaged DNA base, removal of the resulting abasic site, end processing, gap filling and ligation.