The genetic code necessary for building up its own amino acids during the multiplication of a virus is carried by:

Statement $I :$ The codon $'AUG'$ codes for methionine and phenylalanine.
Statement $II :$ $'AAA'$ and $'AAG'$ both codons code for the amino acid lysine.
In the light of the above statements,choose the correct answer from the options given below.

The arrangement of $DNA$ has the triplet base sequence $AAC\ GAC\ AGC\ GGC\ ACA\ AAA$. Due to a mutation,the first base is deleted. What is the likely effect of this on the coding of the $DNA$ segment?

Who proposed the 'one gene one enzyme' hypothesis?

Which of the following represents the correct sequence of codons for the amino acid Alanine?

$A$ triplet codon means