Lifelong Learning Programme

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TEACHERS EXPERIENCES FORM

Title of the Experience
Model: Double-stranded DNA molecule complementarity of bases rule
Name of the teacher
Nevenka Kostova
Country where it took place
Bulgaria
School typology
High Secondary School
Thematic Area
Biology
Experience typology
Teaching in class
Type of contact
Direct
Description of the Experience
The double strand of DNA molecules is bound in a specific manner by hydrogen links, generated by the functional groups of the nitrogen bases. Opposite to nitrogen base adenine (A) always stands nitrogen base (T) – bound with the two hydrogen links. Opposite to nitrogen base guanine (G) always stands nitrogenous base cytosine (C) - bound with three hydrogen links.
Using the model with different colors it is illustrated these links which shows better the connection of nitrogen bases in DNA molecules.

Comments on this Teachers Experience

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Date: 2014.11.26

Posted by Uldis (Latvia)

Students better understand,the model or Picture,but not the written text.And if you show model and tekst the results are better.

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