The Structure of dna:
Each DNA molecule in the cell nucleus consists of two strands of sugars and phosphates with pairs of nitrogen bases forming cross links. This structure is twisted in a spiral shape, called a double helix. To put in basic terms DNA, is two strands coiled together, with chemical cross-links between the two stands, formed by paired bases which I will discuss later. Each Phosphate group and sugar molecule with a nitrogen base attached is called a nucleotide, these are the units that make up the DNA molecule. There are four different types of nitrogen bases, and will only pair in a particular way:
Adenine (A) will only pair with Thymine (T), and Cytosine (C) will only pair with Guanine (G). The order in which the bases occur in the DNA molecule determines the genetic code. Each gene consists of up to 1000 pairs of bases, this means the number of possible combinations is endless.
DNA is a double helix formed by base pairs attached to a sugar-phosphate backbone.
Adenine (A) will only pair with Thymine (T), and Cytosine (C) will only pair with Guanine (G). The order in which the bases occur in the DNA molecule determines the genetic code. Each gene consists of up to 1000 pairs of bases, this means the number of possible combinations is endless.
DNA is a double helix formed by base pairs attached to a sugar-phosphate backbone.