Which of the following organisms has been used for genetic research?

Select the $CORRECT$ statement from the following.

Read the following statements carefully and choose the correct statements.
$(A)$ In a transcription unit,the promoter is located at the $5'$ end of the coding strand.
$(B)$ The single strand $DNA$ having the polarity $5' \rightarrow 3'$ is the template strand.
$(C)$ $RNA$ polymerase binds to the operator during transcription.
$(D)$ Single base $DNA$ differences occurring in humans are called Single Nucleotide Polymorphisms $(SNPs)$.

Match List $I$ with List $II$.

List $I$	List $II$
$A$. Frederick Griffith	$I$. Genetic code
$B$. Francois Jacob and Jacques Monod	$II$. Semi-conservative mode of $DNA$ replication
$C$. Har Gobind Khorana	$III$. Transformation
$D$. Meselson and Stahl	$IV$. $Lac$ operon

Choose the correct answer from the options given below:

Distinguish between: $m-RNA$ and $t-RNA$.

$A$ mutant microorganism that is unable to synthesize a compound required for its growth,but is able to grow if the compound is provided,is known as a/an ...... .