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The Polymerase Chain Reaction (PCR) is a method of DNA amplification in vitro. It consists of 3 stages - denaturation, annealing and extending. PCR relies on the use of a thermophilic Taq polymerase en...
Introns and exons are parts of genes - exons code for proteins, whereas introns do not, ie: exons are converted into messenger RNA to allow these parts of the gene to then be transcribed into protein. ...
Oral cavity, Oesophagus, Stomach, duodenum, jejunum, ileum, colon, rectum, anus.
Ser feliz means that the person is always happy whereas estar feliz means the person is happy today.
A waterfall forms in the upper course of a river. The water here flows over hard and soft rock. The soft rock is eroded more quickly than the hard rock. The river undercuts the hard rock leaving an ove...
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