DNA is the building block of life - it contains instructions for every living thing

DNA stands for deoxyribose nucleic acid


It is shaped like a ladder; made of a sugar and phosphate backbone and base pairs that make up the rungs

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The four bases are

A

Adenine

T

Thymine

G

Guanine

C

Cytosine

There is a specific pairing in normal DNA as shown below, this is due to the shapes of the base pairs

DNA_chemical_structure.svg.png

What is the base pairing seen in the picture?

How many rings do Adenine and Guanine have?


How many rings do Cytosine and Thymine have?


Why do you think nature has designed them like this?


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WEBSITE LINKS

BASICS OF DNA - http://learn.genetics.utah.edu/content/begin/dna/

MORE INFO ON DNA - http://www.biotechnologyonline.gov.au/popups/int_dnazoom.html

BUILD DNA MOLECULE - http://learn.genetics.utah.edu/content/begin/dna/builddna/

DNA MUTATION SITE - http://learn.genetics.utah.edu/archive/mutations/index.html

DNA AND MUTATIONS - http://evolution.berkeley.edu/evolibrary/article/mutations_01




EXTRA READING AND ACTIVITIES- INTERESTING SITES ON DNA

DNA PROFILING - http://www.biotechnologyonline.gov.au/popups/int_dnaprofiling.html

DNA LEARNING CENTRE - http://www.dnalc.org/

DNA EXTRACTION LAB - http://learn.genetics.utah.edu/content/labs/extraction/

DNA GEL ELECTROPHORESIS - http://learn.genetics.utah.edu/content/labs/gel/