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Modified tumour free T(1) plasmid carryi...

Modified tumour free `T_(1)` plasmid carrying a desired gene is called

A

Cosmid

B

Phagemid

C

T-DNA

D

BAC

Text Solution

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The correct Answer is:
To solve the question regarding the modified tumor-free T1 plasmid carrying a desired gene, we will analyze the options provided and determine which one correctly identifies this plasmid. ### Step-by-Step Solution: 1. **Understanding the Question:** - The question asks for the name of a modified tumor-free T1 plasmid that carries a desired gene. 2. **Analyzing the Options:** - **Option A: Cosmid** - A cosmid is a hybrid plasmid that contains a lambda phage cos sequence. It is primarily used for cloning DNA fragments but is not related to the T1 plasmid. Therefore, this option is incorrect. - **Option B: Phasmid** - A phasmid is another type of hybrid plasmid that combines features of both phage and plasmid. While it has its uses in cloning, it is not specifically associated with the T1 plasmid. Thus, this option is also incorrect. - **Option C: tDNA** - tDNA (transfer DNA) is a segment of the Ti plasmid that is modified to carry foreign genes into plant cells. It is specifically designed to be tumor-free and is used as a vector for introducing desired genes into plants. This option is correct. - **Option D: BAC** - BAC (Bacterial Artificial Chromosome) is designed for cloning large DNA fragments. While it is an important vector, it does not relate to the T1 plasmid or the context of the question. Therefore, this option is incorrect. 3. **Conclusion:** - The correct answer is **Option C: tDNA**. This is the modified tumor-free T1 plasmid that carries a desired gene.
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