Which statement about the genetic code is not true?

Coding sequences are read in groups of three adjacent nucleotides.
No codon normally specifies more than one amino acid.
Each species of organisms has its own unique genetic code.
Some amino acids are specified by more than one codon.
Genetic messages are punctuated with start and stop signals.

Question

Which statement about the genetic code is not true?
  
       Coding sequences are read in groups of three adjacent nucleotides.
       No codon normally specifies more than one amino acid.
       Each species of organisms has its own unique genetic code.
       Some amino acids are specified by more than one codon.
       Genetic messages are punctuated with start and stop signals.

anonymous · Answer

http://www.answers.com/topic/genetic-code

anonymous · Answer

"No codon normally specifies more than one amino acid." ?

anonymous · Answer

Also, thank-you for your quick response! :)