Saturday, November 5, 2011

Gel electrophoresis

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Gel electrophoresis is used to separate DNA fragments. Electrophoresis uses an electric current to separate different-sized molecules in a s...

DNA Profiling

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Genes make up the blueprint for our bodies and almost every cell in the human body contains a copy of the blueprint, stored inside the nucle...
Monday, October 31, 2011

4.4.1 Outline the use of polymerase chain reaction (PCR) to copy and amplify minute quantities of DNA.

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PCR is the cloning or amplification of DNA, copies need to be made to rapidly increase the amount of DNA, this is useful if the source of DN...
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Friday, October 28, 2011

Past Paper Questions on Bio engineering

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Discuss the ethical arguments for and against the cloning of humans [4] The definition of clone is a group of genetically identical organism...
Wednesday, October 26, 2011

4.4.10 Discuss the potential benefits and possible harmful effects of one example of genetic modification.

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A genetically modified organism (GMO) is an organism containing a transplanted gene. An example is in the genetically modified salt toleran...

4.4.8 Outline a basic technique used for gene transfer involving plasmids, a host cell (bacterium, yeast or other cell), restriction enzymes (endonucleases) and DNA ligase.

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Gene transfer is when a gene from one organism is taken and placed in another organism. Stage 1 is obtaining the gene for transfer. This is...
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Wednesday, August 24, 2011

E.6.7 Outline two examples illustrating the adaptive value of rhythmical behavior patterns.

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North American flying squirrels They are adapted to fly at night because at night there is the most food and the least competition. Its pat...