Document page
biology 0610printed 313 · PDF 313
328 pagesrevision 46933
printed 313 · PDF 313
Page image rendered from the stored file at 110 dpi; it sharpens as you zoom. Outlines are placed from each region’s stored position on the page (612 × 792 pt).
readable
Source of this text: embedded text layer. The better of the embedded text and OCR is kept.
313
● Complementary sticky ends joined using enzyme DNA ligase, forming recombinant
plasmid
● Plasmid is inserted back into bacterium and the gene is expressed, producing
the desired protein
● The bacterium can be placed into a fermenter for exponential growth and product
Examples of Genetic Engineering:
● Insulin can be produced through genetic modification in high quantities
● Genes can be inserted into plants and crops, making them resistant to insects and
herbicides
● Vitamin rich plants can be produced, plants can be genetically altered to contain
more nutrients. Golden rice is an example, it produces beta carotene which can be
synthesized to produce Vitamin A
Advantages and Disadvantages of Genetic Engineering:
● Reduce nutritional deficiencies in some areas and children
● Improve crop yield and production
● Genetically modified crops are more resistant to pest and disease and resistance to
harsh environmental conditions
● However, they cause a loss in biodiversity
● Superweeds may come to reality which are resistant to the modified crops
● The modified crops are more expensive and are less researched.