The coding portions of eukaryote genes are called exons. The other end of the tRNA grabs an amino acid that corresponds to the mRNA codon. As the ribosome moves along the RNA, new tRNAs match with each newly exposed codon, and new a.a.'s are linked to a growing polypeptide chain until the finished amino acid sequence is released and folded into a protein.
Prokaryotes lack cellular organelles.
Bacteria are Eukaryotes. The Eukaryotic Cell Genetic Code Chromosomes DNA is organized in cells into molecules called chromosomes. Chromosomes consist of DNA wrapped around proteins called Histones. DNA is double-stranded. A sense and anti-sense strand.