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प्रश्न
What modification is done on the Ti plasmid of Agrobacterium tumefaciens to convert it into a cloning vector?
उत्तर
T-DNA is the only essential part required to make Ti plasmid a cloning vector. The plasmid is disarmed by deleting the tumour-inducing genes in the plasmid so that it becomes an effective cloning vector and remove it harmful effect.
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संबंधित प्रश्न
Name the selectable markers in the cloning vector pBR322? Mention the role they play.
State how has Agrobacterium tumifaciens been made a useful cloning vector to transfer DNA to plant cells.
Draw a schematic sketch of pBR 322 plasmid and label the following in it:
(a) Any two restriction sites.
(b) Ori and rop genes.
(c) An antibiotic resistant gene.
Describe briefly the following:
Origin of replication
Answer the following question.
Expand ‘YAC’ and mention what it was used for.
Which of the following is correctly matched?
Which of the following is not a cloning vector?
Plasmid pBR322 has a PstI restriction enzyme site within gene ampR that confers ampicillin resistance. If this enzyme is used for inserting a gene for β-galactoside production and the recombinant plasmid is inserted in an E.coli strain.
Name the regions marked A, B and C.
For selection of recombinants, insertional inactivation of antibiotic marker has been superceded by insertional inactivation of a marker gene coding for a chromogenic substrate. Give reasons.
