The 'one gene-one enzyme' hypothesis was proposed by . . . . . . .

If there are $6$ types of nitrogen bases and $40$ types of amino acids available for protein synthesis,what is the minimum number of nitrogen bases required to form a codon in the genetic code?

Match the following columns:

Column-$I$ (Genetic Code)	Column-$II$ (Amino Acid)
$P$. $UAA$	$I$. Proline
$Q$. $CCA$	$II$. Glycine
$R$. $GGC$	$III$. Termination
$S$. $AGU$	$IV$. Serine

There are $64$ types of codons in the genetic code dictionary because:

If the sequence of nucleotides on $m-RNA$ is $AUG, UUU, CUU, AAC, GCA, CAC$,what will be the sequence of amino acids encoded by these codons?

Explain the concept of the genetic code.