Since most amino acids are represented by more than one codon,the genetic code is said to be . . . . . . .

The vector for genetic code is called

The "one gene one enzyme" theory was proposed by:

There is only one possible sequence of amino acids when deduced from a given nucleotide sequence. However,multiple nucleotide sequences can be deduced from a single amino acid sequence. Explain this phenomenon.

Which of the following triplet codons correctly represents a start or stop signal for protein synthesis?

Statement $P$: An $m-RNA$ consists of $75$ nucleotides.
Statement $Q$: There are $61$ types of codons in the cytoplasm.