$A$ : Polypeptide sequences are dictated by $DNA$ and represented by $mRNA$.
$R$ : Sequence of amino acids in a polypeptide can be predicted by the exact sequence of nucleotides on the $mRNA$ and template $DNA$

Which one of the following statements about the particular entity is true ?

Give scientific reasons : It is essential that $ tRNA$ binds to both amino acids and $mRNA$ codon during
protein synthesis.
 

Which of the following statements are correct?

$i. r-RNA$ provides the template for synthesis of proteins.

$ii.$$ t-RNA$ brings amino acids and reads the genetic code.

$iii. $$RNA$ polymerase binds to promoter and initiates transcription.

$iv. $A segment of $DNA$ coding for polypeptide is called intron.

Differentiate between the followings:

$(a)$ Repetitive $DNA$ and Satellite $DNA$

$(b)$ $mRNA$ and $tRNA$

$(c)$ Template strand and Coding strand