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The tumor including capacity of A is loc...

The tumor including capacity of _A_ is located in large extra-chromosomal plasmid called Ti plasmid. Choose the option which correctly fills up the blanks _A_

A

Thermus aquaticus

B

Retrovirus

C

E.coli

D

Agrobacterium tumefeciens

Text Solution

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The correct Answer is:
To solve the question regarding the tumor-inducing capacity related to the Ti plasmid, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Ti Plasmid**: The Ti plasmid (Tumor-inducing plasmid) is a large plasmid found in the bacterium Agrobacterium tumefaciens. It is known for its role in transferring genes to plant cells, which can lead to tumor formation in plants. 2. **Identifying the Options**: The options provided are: - A) Thermus aquaticus - B) Retrovirus - C) E. coli - D) Agrobacterium tumefaciens 3. **Analyzing Each Option**: - **A) Thermus aquaticus**: This bacterium is known for its heat-stable DNA polymerase used in PCR but does not have any association with Ti plasmids or tumor formation. - **B) Retrovirus**: Retroviruses are RNA viruses that can integrate into the host genome but are not related to Ti plasmids or plant tumor induction. - **C) E. coli**: While E. coli is a common laboratory bacterium, it does not possess Ti plasmids and is not involved in inducing tumors in plants. - **D) Agrobacterium tumefaciens**: This is the correct answer as it is the only option that possesses the Ti plasmid, which is responsible for the tumor-inducing capacity in plants. 4. **Conclusion**: Based on the analysis, the blank _A_ should be filled with "Agrobacterium tumefaciens". ### Final Answer: The correct option that fills the blank _A_ is **D) Agrobacterium tumefaciens**.
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