What makes gene transfer between species possible?

A. All species use the same genetic code.
B. All species have the same genetic material.
C. All species produce the same polypeptides.
D. All species transcribe genes using plasmids.

A

In question 12, answer B was chosen by an unexpectedly large number of candidates. Perhaps these candidates rejected answer A because they misunderstood the term genetic code. This term is sometimes used to mean the base sequence of genes in a genome, whereas the correct meaning is the correspondence between each of the 64 codons and the amino acids into which they are translated.