Question:
The Ti plasmid used in genetic engineering in plants is obtained from -------------.
The Ti plasmid used in genetic engineering in plants is obtained from -------------.
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Ti means tumour inducing and it causes crown gall in dicot plants.
Updated On: Nov 12, 2026
- Bacillus thuringiensis
- Escherichia coli
- Agrobacterium tumefaciens
- Salmonella typhi
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
The Ti (tumour inducing) plasmid lets a soil bacterium cause crown gall disease in dicot plants.
Step 2: Source
Part of the plasmid, called T-DNA, is naturally transferred into the plant genome. The plasmid comes from Agrobacterium tumefaciens.
Step 3: Use as vector
After the tumour-causing genes are removed (disarmed), it is used as a vector to carry desired genes into plants.
Step 4: Conclusion
The Ti plasmid is obtained from Agrobacterium tumefaciens.
Final Answer:
The Ti plasmid is obtained from Agrobacterium tumefaciens. \[ \boxed{\text{(C) }\text{Agrobacterium tumefaciens}} \]
The Ti (tumour inducing) plasmid lets a soil bacterium cause crown gall disease in dicot plants.
Step 2: Source
Part of the plasmid, called T-DNA, is naturally transferred into the plant genome. The plasmid comes from Agrobacterium tumefaciens.
Step 3: Use as vector
After the tumour-causing genes are removed (disarmed), it is used as a vector to carry desired genes into plants.
Step 4: Conclusion
The Ti plasmid is obtained from Agrobacterium tumefaciens.
Final Answer:
The Ti plasmid is obtained from Agrobacterium tumefaciens. \[ \boxed{\text{(C) }\text{Agrobacterium tumefaciens}} \]
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