What are Bt crops? Explain in brief about how they are produced with a suitable example.
Important Questions on Biotechnology and its Applications
The correct combination pair of given strategies in the area of health care developed by the rDNA technological processes.
| (I) | ELISA | Antigen-antibody interaction |
| (II) | RNA interference | Cellular defence |
| (III) | PCR | Gene therapy |
| (IV) | Transgenic potato | Pseudomonas resistance |
Increased efficiency of mineral usage
Alternative resources to industries
Enhanced nutritional value of food
Better management practices and uses of agrochemicals
Assertion (A) : Transgenic Golden Rice is rich in Vitamin A and prevents blindness.
Reason (R) : It is obtained from "Taiwan"
Assertion Bt toxin exists as inactive prototoxin but once an insect ingests the inactive toxin, it is converted into an active form of toxin.
Reason Protoxin gets activated in insect gut due to the acidic in the gut, which solubilises the protein crystals.
The correct answer is:
Match the following lists:
| List | List | ||
| A) | Transgenic papaya | Antigen-antibody interaction | |
| B) | Super weeds | Ring spot virus | |
| C) | Soya bean | Gene pollution leads to resistance to weedicides | |
| D) | ELISA | Herbicide tolerant |
The correct match is
A) Inactive prototoxin activation occurs in alkaline
B) Choice of Bt toxin genes is universal to all crops but specific to the targeted pest
C) Choice of Bt toxin genes are universal to pest but specific to crop
D) All strains of Bacillus thuriangensis do not produce prototoxin
Assertion A: In Bt cotton B. thuringiensis produces a toxic insecticidal crystalline protein which destroys bollworms.
Reason R: B. thuringiensis produces this toxic protein in an inactive form, but when an insect ingests this inactive protein, it is converted into active form of toxin due to the alkaline pH of gut which solubilises the crystals, which is responsible for the death of bollworm.
Reason (R): and controls the cotton boll worms
