DNA, which stands for deoxyribonucleic acid, is a molecule that supplies the genetic instructions that tell living creatures how to develop, live and reproduce. DNA can be found inside every cell and is passed down from parents to their offspring.
What’s DNA produced from?
DNA is made up of molecules called nucleotides. Each nucleotide contains three components: a phosphate group, which is one phosphorus atom bonded to four oxygen atoms; a sugar molecule; and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C), and together, these serve as the «letters» that make up the genetic code of our DNA.
Nucleotides are connected together with her to make a couple of long strands one spiral to make a pattern entitled a dual helix. If you were to think of twice-helix build due to the fact a ladder, the newest phosphate and you will glucose molecules will be sides, as feet sets would be the rungs. The fresh angles on a single strand few with the bases with the various other strand: Adenine sets which have thymine (A-T), and you may guanine sets with cytosine (G-C).
Human DNA is made up of around 3 billion base pairs, and more than 99% of those bases are the same in all people, according to the U.S. National Library off Medication (NLM).
Similar to the way that letters in the alphabet can be arranged to form words, the order of nitrogen bases in a DNA sequence forms genetics, which, in the language of the cell, tell cells how to make proteins. The shorthand for this process is that genes «encode» proteins.
But DNA is not the direct template for protein production. To make a protein, the cell makes a copy of the gene, using not DNA but ribonucleic acid, or RNA. RNA shares a similar structure to DNA, except it contains only one strand, rather than two – so look at these guys it looks like just one half of a ladder. Leer más