what are it's composition?
It is composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses.
DNA
Deoxyribonucleic acid (; DNA) is a molecule composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. 
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. 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. what is the full form of the above acronym? Deoxyribonucleic acid
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DNA [SEP] Introduction
Deoxyribonucleic acid (; DNA) is a molecule composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid (RNA) are nucleic acids. Alongside proteins, lipids and complex carbohydrates (polysaccharides), nucleic acids are one of the four major types of macromolecules that are essential for all known forms of life. The two DNA strands are known as polynucleotides as they are composed of simpler monomeric units called nucleotides. Each nucleotide is composed of one of four nitrogen-containing nucleobases (cytosine [C], guanine [G], adenine [A] or thymine [T]), a sugar called deoxyribose, and a phosphate group.