An antibiotic resistance gene in a vector usually helps in the selection of

Agarose is extracted from which of the following?

Given below are two statements:
Statement $I:$
Restriction endonucleases recognise specific sequences to cut $DNA$,known as palindromic nucleotide sequences.
Statement $II:$
Restriction endonucleases cut the $DNA$ strand a little away from the centre of the palindromic site.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which vector is useful for gene transfer in plants?

$A$ : During gel electrophoresis,the $DNA$ fragments move towards the anode.
$R$ : $DNA$ fragments are negatively charged molecules.

Match the following columns:

Column-$I$	Column-$II$
$(a) \ Cla \ I$	$(1) \ \text{Antibiotic resistance gene}$
$(b) \ pBR322$	$(2) \ \text{Origin of replication}$
$(c) \ tet^R$	$(3) \ \text{Restriction enzyme}$
$(d) \ ori$	$(4) \ \text{Plasmid}$