DNA- nucleic acid that contains genetic instructions used in the development and functioning of all known living organisms.
DNA is locates in the cell nucleus, however a small amount is found in mitochondria. Every person has the same DNA in their body.
4 Chemical Bases: Adenine, Guanine, Cytosine, and Thymine
base pair :Guanine- Cytosine
Their are attached to sugar molecules and phosphate molecules, they are called nucleotide( back bone). Nucleotide have two long strands that are form a spiral thats called double helix. These base pairs form ladder's rung and the sugar and phosphate form the vertical side of the ladder like figure.
Proteins attach to DNA and help the starnds coil ip into the chromosome when the cell gets divide
Replicate: DNA can make copies of itself. Each cells divides because each new cell need to have a exact copy of DNA present in the old cell.
http://ghr.nlm.nih.gov/handbook/basics/dna
No comments:
Post a Comment