Genetic Modification (genetic Engineering)
Overview
Selective breeding takes generations and is limited to the traits already present in a species. Genetic modification breaks both of those barriers: scientists can now cut a gene from one organism and paste it into an entirely different species, producing a result in months rather than decades.
In this lesson you will learn how restriction enzymes and ligase work together to build recombinant DNA, how plasmids and viruses act as vectors, and how these tools have made it possible to mass-produce human insulin and engineer crops that resist pests and drought.
Objectives
- Understand how restriction enzymes are used to cut DNA at specific sites and ligase enzymes are used to join pieces of DNA together
- Understand how plasmids and viruses can act as vectors, which take up pieces of DNA, and then insert this recombinant DNA into other cells
- Understand how large amounts of human insulin can be manufactured from genetically modified bacteria that are grown in a fermenter
- Understand how genetically modified plants can be used to improve food production
- Understand that the term transgenic means the transfer of genetic material from one species to a different species
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Genetic Modification (genetic Engineering). Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- What do restriction enzymes do? A) Join two pieces of DNA together B) Cut DNA at specific base sequences C) Copy DNA during cell division D) Unwind the DNA double helix Answer: B
- What is the role of DNA ligase in genetic engineering? A) It cuts DNA into fragments B) It copies DNA C) It joins pieces of DNA together permanently D) It identifies the desired gene Answer: C
- Which of the following can act as a vector in genetic engineering? A) A ribosome B) A mitochondrion C) A plasmid D) A chromosome Answer: C
- What does the term 'transgenic' mean? A) An organism that has been selectively bred B) An organism containing DNA from a different species C) An organism that reproduces asexually D) An organism that has mutated naturally Answer: B
- Why are bacteria used to produce human insulin? A) They have a nucleus containing chromosomes B) They reproduce slowly and produce pure insulin C) They reproduce rapidly, contain plasmids, and share the same genetic code D) They are the only organisms that can read human DNA Answer: C
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