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Practice each question, then open the answer or worked solution.
How was Insulin obtained before the advent of rDNA technology? What were the problems encountered?
Insulin is obtained from the pancreas of slaughtered animals. Due to slight changes in the polypeptide chain, it developed allergic reactions in humans
Concerning understanding diseases, discuss the importance of transgenic animal models.
Transgenic animals are used as a model organism for the production of desired products. They are used to study diseases like cancer and Alzheimer’s and their treatment. In future, it can be used to grow human organs for transplant purposes.
Name the first transgenic cow. Which gene was introduced in this cow?
Rosie was the first transgenic cow. Gene coding for the production of α-lactoalbumin was introduced into the cow.
PCR is a useful tool for early diagnosis of an infectious disease. Elaborate.
PCR involves the amplification of DNA strands. Hence, the infectious organism can be detected at an early stage of infection due to the production of its multiple copies, which can be detected easily.
What is GEAC, and what are its objectives?
1. The main objective of GEAC is to decide the validity of genetic recombination.
2. To test the safety of the introduction of genetically modified organisms in public services.
For which variety of Indian rice, the patent was filed by a USA Company?
The patent was filed for a rice variety obtained by crossing Basmati rice and semi-dwarf variety of rice.
Discuss the advantages of GMO.
1. GM plants have increased nutritional value and higher yield.
2. Cost-effective
3. It increases resistance toward pests and diseases e.g. Bt cotton.