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(D) The plasmid $pBR322$ is a widely used cloning vector in $E. coli$.$1$. $ori$ stands for the origin of replication,which is the sequence where repl

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$amp^R, tet^R$ - Antibiotic resistance genes

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(D) The plasmid $pBR322$ is a widely used cloning vector in $E. coli$.$1$. $ori$ stands for the origin of replication,which is the sequence where replication starts.$2$. $rop$ codes for the proteins involved in the replication of the plasmid.$3$. $Hind III$ and $Eco RI$ are restriction sites (recognition sites) for specific restriction enzymes,not selectable markers.$4$. $amp^R$ (ampicillin resistance) and $tet^R$ (tetracycline resistance) are the selectable markers that help in identifying and eliminating non-transformants and selectively permitting the growth of the transformants.

The given figure represents the cloning vector $pBR322$ of $E. coli$. Which of the following options correctly identifies its components?

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