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
Ti plasmid being used for introducing genes in plants obtained from ______.
What is Palindromic sequence?
What is gene cloning? Explain different tools used for it.
For which of the following reason Agrobacterium tumefaciens is most widely used for gene transfer in plants?
____________ cuts the DNA within the specific positions.
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 |
____________ is the manipulation of genetic material towards a desired end, in a directed and predetermined way, using in vitro process.
The transfer of genetic material from one bacterium to another through the mediation of a viral vector is termed as ______.
Which of the following enzyme catalyses the removal of nucleotides from the end of DNA molecules?
Identify the desirable characteristics for a plasmid used in rDNA technology from the following.
- Ability to multiply and express outside the host in a bioreactor.
- A highly active promoter.
- A site at which replication can be initiated.
- One or more identifiable marker genes.
- One or more unique restriction sites.
