divendres, 4 de febrer del 2011

The Listening



Please listen and answer the questions:

1) What is the meaning of the acronym DNA?
2) How the base pairs Adenine, Thymine, Guanine and Cytosine are connected?
3) Could Adenine  be connected with Guanine? Why?
4) Besides the base pairs. How other components have the DNA strand?
5)  What is a gene?

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