Advertisements
Advertisements
प्रश्न
One of the major contributions of biotechnology is to develop pest-resistant varieties of cotton plants. Explain how it has been made possible.
Advertisements
उत्तर
One of the major contributions of biotechnology is the development of insect resistant variety of cotton called Bt cotton. This plant contains the gene (cry gene) from the bacteria Bacillus thuringiensis.
Genes encoded by Cry IAc and Cry II Ab control cotton bollworms and those encoded by Cry IAb control corn borer. The gene from the bacteria is transferred to the plant cell with the help of Agrobacterium Ti-plasmid. The product of this gene is Bt toxin. This toxin is a type of protein that is toxic to a variety of insects including bollworm complex.
APPEARS IN
संबंधित प्रश्न
Give the steps in PCR or polymerase chain reaction with suitable diagrams.
ECoRI is obtained from ______.
Polymerase chain reaction is most useful in ______.
From the following identify the methods of electrophoresis.
Match the column I (PCR steps) and Column II (Temperature). Select the correct option.
| Column I (PCR steps) | Column II (Temperature) | ||
| i. | Polymerization | P. | 40 - 60°C |
| ii. | Denaturation | Q. | 70 - 75°C |
| iii. | Primer annealing | R. | 90 - 98°C |
| S. | 28 - 37°C |
In PCR technique, the organism providing thermostable DNA polymerase is a ____________.
Which molecules are called molecular scissors? Why are they called so?
The source of taq Polymerase used in PCR is a ______.
Which of the following enzyme catalyses the removal of nucleotides from the end of DNA molecules?
______technique is used for in vitro gene cloning or gene multiplication.
