Yeast has become important in genetic engineering because it:

What does $P$ represent in the given figure?

Match the following columns:

Column-$I$	Column-$II$
$(a)$ $Salmonella$	$(1)$ $Ti$ plasmid
$(b)$ $E. coli$	$(2)$ Thermostable $DNA$ polymerase
$(c)$ $Agrobacterium$ $tumefaciens$	$(3)$ Plasmid for first $r-DNA$
$(d)$ $Thermus$ $aquaticus$	$(4)$ $EcoR I$

'Cloning' is meant for

Choose the incorrect option $-$

Read the following statements carefully and select the correct option $:-$
$(A)$ Source of the restriction enzyme Hind $II$ is Haemophilus influenzae.
$(B)$ If any protein encoding gene is expressed in a heterologous host,it is called as recombinant protein.
$(C)$ Microinjection method for injecting foreign gene is used for animal cell.
$(D)$ $\text{DNA}$ primers are chemically synthesized oligonucleotides that are complementary to the regions of $\text{DNA}$ in $\text{PCR}$.
How many of the above statements are correct?