Silencing a specific mRNA in order to prevent its translation is known to be a cell defense mechanism . What is the name of this process useful in making transgenic organisms ?

Assertion: RNAi involves silencing of a specific mRNA due to complementary RNA that bind to & prevents translation of the mRNA Reason :RNAi takes place in all prokaryotic organisms as a method of cellular defense

Diseases in humans can be prevented by administration of vaccines. Vaccines contain inactivated, killed / weakened pathogens that can be used as antigens to provide either permanent or temporary immunity against a specific pathogen or disease. Conventional methods of vaccine preparation include the use of completely or partially killed pathogens. These vaccines however posed a risk of causing disease in case of some persons. Biotechnological techniques provide alternative antigenic genes isolated in the laboratory that can be used to make pure forms of proteins that can be used as antigens to activate the immune system. Recent developments in this field include production of edible vaccines like transgenic potatoes. Consumption of raw potatoes is speculated to develop immunity against the pathogen. These edible vaccines are produced by inserting genes isolated from specific pathogens to produce the antigen in the plants. Based on the given paragraph answer the following questions. What is the disadvantage of transgenic potatoes containing edible vaccines?

Which of the following statements are correct regarding the process of RNA interference ? (i) RNAi has been used to prevent nematode infestation of tobacco plants . (ii) RNAi takes place in all eukaryotic organisms as a method of cellular defense. (iii) The method involves silencing of specific mRNA using a complementary dsDNA molecule that binds and prevents the translation of mRNA. (iv) using retrovirus vectors , nematode–specific genes were introduced into the host plant .

Which of the following statements are correct regarding the process of RNA interference ? (i) This is used to prevent the infestation of protozoans (ii) It takes place in some eukaryotic and all prokaryotic organism as a method of cellular defense (iii) The method involves silencing of a specific mRNA due to a complementary dsRNA molecule (v)It is a novel strategy to produce pest-resistant plants.

Which of the following statements are correct regarding the process of RNA interference ? (i) This is used to prevent the infestation of protozoans (ii) It takes place in some eukaryotic and all prokaryotic organism as a method of cellular defense (iii) The method involves silencing of a specific mRNA due to a complementary dsRNA molecule (v)It is a novel strategy to produce pest-resistant plants.

What is the immune system? What are its main kinds? What is the role of B-type and T-type cells in the body's defensive mechanism?