Question: Which of the following characteristics of the genetic code is NOT CORRECT ?: 
 Options:  <1> The sequence of nitrogenous bases of a given gene has a fixed reading frame and no punctuation marks. <2> It is degenerate, because for many amino acids there is more than one codon that encodes it. <3> The degeneration of the genetic code supposes an adaptive mechanism that reduces the harmful effects of the mutations. <4> It is totally universal, allowing the heterologous expression of human proteins (eg insulin) in prokaryotic organisms such as E. coli. <5> Its reading is always done from the 5'-phosphate end towards the hydroxyl of the messenger RNA (mRNA).
4