Out of $64$ codons,$61$ codons code for $20$ types of amino acids. This phenomenon is called:

Which of the following statements regarding the genetic code is incorrect?
$i.$ The codon is a triplet.
$ii.$ $64$ codons code for amino acids.
$iii.$ The genetic code is unambiguous.
$iv.$ The genetic code is universal.
$v.$ $AUG$ has dual functions.

The terms $Gene$ and $Cistron$ are sometimes used as synonyms because:

Which is the initiator codon?

How many genetic codes specify the amino acid proline?

The genetic code of the checkerboard (codon table) is not applicable to which of the following?