Define DNA.
DNA (deoxy ribonucleic acid) is a molecule that carries the genetic instructions used in the growth, development, functioning and reproductionof all known living organisms and many viruses. DNA and ribonucleicacid acid (RNA) are nucleic alongside proteins, lipids and complex carbohydrates. They are one of the four major types of macromolecules that are essential for all known forms of life. Most DNA molecules consist of two biopolymer strands strands coiled around each other to form a double helix.
The two DNA strands are called polynucleotides since since they are composed of simpler monomer 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. The nucleotides are joined to one another in a chain by covalent bonds between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar phosphate backbone The nitrogenous bases of the two separate polynucleotide strands are bound together, according to base pairing rules (A with T and C with G), with L hydrogen bond to make double-stranded DNA.
DNA (deoxy ribonucleic acid) is a molecule that carries the genetic instructions used in the growth, development, functioning and reproductionof all known living organisms and many viruses. DNA and ribonucleicacid acid (RNA) are nucleic alongside proteins, lipids and complex carbohydrates. They are one of the four major types of macromolecules that are essential for all known forms of life. Most DNA molecules consist of two biopolymer strands strands coiled around each other to form a double helix.
The two DNA strands are called polynucleotides since since they are composed of simpler monomer 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. The nucleotides are joined to one another in a chain by covalent bonds between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar phosphate backbone The nitrogenous bases of the two separate polynucleotide strands are bound together, according to base pairing rules (A with T and C with G), with L hydrogen bond to make double-stranded DNA.
