MCQ
An antibiotic resistance gene in a vector usually helps in the selection of
- ACompetent cells
- ✓Transformed cells
- CRecombinant cells
- DBoth $(b)$ and $(c)$
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$I.$ It does not help in water conduction.
$II.$ It is also called alburnum.
$III.$ It is dark in colour but very soft.
$IV.$ It has tracheary elements, which are filled with tannin, resin, etc.
Assertion $(A):$
Polymerase chain reaction is used in DNA amplification
Reason $(R):$
The ampicillin resistant gene is used as a selectable marker to check transformation
In the light of the above statements, choose the correct answer from the options given below :