PROTEIN SYNTHESIS. DECEMBER 13, 2010 CAPE BIOLOGY UNIT 1 MRS. HAUGHTON. GENE. Mendel 1866 described a gene as a unit of inheritance Morgan defined it as the shortest segment of a chromosome which could be separated from adjacent segments by crossing over. GENE.
DECEMBER 13, 2010
CAPE BIOLOGY UNIT 1
Such a code would produce ________ combinations of bases.
43 = 64
Let’s look at themTRIPLET CODON
DNA makes RNA and RNA makes PROTEIN which is responsible for how we look and function
Only one of the strands can be selected as a template for the formation of a complementary single strand of mRNA.
When the mRNA molecules have been synthesized, they leave the nucleus via the nuclear pores and carry the genetic code to the ribosomes.
The second codon then also subtracts the aminoacyl-tRNA molecule showing the complementary anticodon.
Once the new amino acid has been added to the growing polypeptide chain the ribosome moves one codon along the mRNA.
This sequence of ribosome reading and translating the mRNA code continues until it comes to a codon signaling STOP.
At this point the polypeptide chain, now with its primary structure as determined by the DNA, leaves the ribosome and translation is complete.