Which of the following options correctly describes the translocation of ribosomes on mRNA during translation?

The ribosome moves one nucleotide along the mRNA in the 5' to 3' direction. 

The ribosome moves one codon along the mRNA in the 3' to 5' direction. 

The ribosome moves one codon along the mRNA in the 5' to 3' direction. 

The ribosome moves three codons along the mRNA in the 5' to 3' direction.