7/30/2019 Biology Unit 5 Questions

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3) Cancer-causing genes could have been introduced into the cells of mice, naked mole rat andhumans using different processes including microinjection, microprojectiles and liposomewrapping; microinjection includes the DNA being injected into the cell directly via a micropipetteand manipulated using a micromanipulator to ensure that the cell isnt destroyed this seemsto be the most successful method, even though many cells have to be injected before onetakes up the DNA successfully. Microprojectiles is the process by which DNA is shot into thecell at high speeds and is usually carried on Gold/Tungsten pellets. Harmless viruses can beengineered to carry the desirable gene (in this case, the cancerous one) and is then used toinfect the animal cells. Finally, liposome wrapping includes the gene being inserted into smallspheres formed from a lipid bilayer, which are then able to fuse with the cell membrane and candeliver the DNA into the cytoplasm.