Use the following information to answer the next few questions.
A transfer RNA (#1) attached to the amino acid lysine enters the ribosome. The lysine binds to the growing polypeptide on the other tRNA (#2) in the ribosome already.
-Which of the following is not true of a codon?
A) It consists of three nucleotides.
B) It may code for the same amino acid as another codon.
C) It never codes for more than one amino acid.
D) It extends from one end of a tRNA molecule.
E) It is the basic unit of the genetic code.

Question

Quizplus · Accepted Answer

A codon is a sequence of three nucleotides on the mRNA that specifies a particular amino acid, but it does not extend from one end of a tRNA molecule. The tRNA molecule carries the appropriate amino acid and has an anticodon that pairs with the codon on the mRNA.

Use the Following Information to Answer the Next Few Questions