What is DNA
(deoxyribonucleic acid) is contained in the of every . It is the main component of and is the material that transfers genetic characteristics from one generation to the next.
DNA needs to be released from the cell’s nucleus before it can be analysed.
A DNA molecule actually has two strands of nucleotides that join together and wrap around each other to form a structure known as the.
The sugar-phosphate-nucleotides of DNA strands are represented by the letters G, A, T and C. Instructions or codes are ‘written’ in the sequence of the nucleotides. For example, a GATCCA sequence carries a different instruction to a GACCAT sequence.
Try the activity, Modelling DNA with your class.
Making multiple copies of DNA
Once a DNA molecule has been extracted, it can be copied by DNA cloning or the . (PCR)
Generating multiple copies of DNA or of a particularis an important first step in many biotechnology, science and applications.