Class Summary - To start class today, students took a quiz on mitosis. Then, we really broke down protein synthesis. We reviewed the process of transcription. Transcription happens in the nucleus where the DNA is housed. Helicase will unzip DNA at a particular gene. RNA polymerase then assembles mRNA using free floating nucleotides in the nucleus. mRNA is created as a complementary strand to the gene that is coded for. Groups of three mRNA nucleotides is called a codon. This codon is the code for amino acids. mRNA then leaves the nucleus into the cytoplasm where translation occurs. During translation mRNA gets sandwiched between a ribosome. As the ribosome travels across the mRNA strand it joins tRNA nucleotides to the mRNA strand. Three tRNA nucleotides make an anticodon. Each anticodon carries with it an amino acid. The amino acids will then bind together to make a peptide chain; which is a protein. We reviewed this process going through the slides below as worksheets. Then, I gave students a practice quiz on transcription and translation. Finally, I had students go here: www.zerobio.com/drag_oa/protein/overview.htm and complete the online activity regarding transcription and translation.
Homework - Start Studying for Wedneday's Test on Cell Structure and Function
Objectives - Students will review protein synthesis.