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

$(i)$ The codon is read in mRNA in a contiguous fashion. There are no punctuations.
(ii) Some amino acids are coded by more than one codon.
(iii) $UUU$ would code for phenylalanine.
(iv) $GAA$ is a stop terminator codon.
Comparing the above statements (i-iv),select the correct option marked with $T$ (True) and $F$ (False) with respect to the salient features of the genetic code.

Which of the following are salient features of the genetic code?

What role does messenger $RNA$ play in the synthesis of proteins?

How many genes determine the synthesis of one enzyme?

Who discovered the chemical method for the synthesis of $RNA$ molecules with defined combinations of bases?