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

• A. The ribosome moves one nucleotide along the mRNA in the 5' to 3' direction. 
• B. The ribosome moves one codon along the mRNA in the 3' to 5' direction. 
• C. The ribosome moves one codon along the mRNA in the 5' to 3' direction. 
• D. The ribosome moves three codons along the mRNA in the 5' to 3' direction. 

Answer: (C)