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2: Molecular Biology and Genetics

  • Page ID
    258615
    • Katherine E. Brent & Sydney Quinn Chizmeshya

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    Learning Objectives
    • Explain the roles of DNA, mRNA codons, ribosomes, and amino acids in protein synthesis
    • Summarize protein synthesis: key steps and locations in a cell
    • Practice transcription and translation

    • 2.1: Protein Synthesis
      This chapter explains protein synthesis, which consists of transcription and translation. Transcription involves converting DNA into messenger RNA (mRNA) and processing it by splicing out introns. Translation is the process where ribosomes read mRNA and tRNA assists in assembling amino acids into proteins. The LCT gene, responsible for lactase enzyme production, illustrates genetic regulation in protein synthesis, affecting lactase persistence or intolerance among individuals.
    • 2.2: Protein Synthesis Pizza
      This page covers protein synthesis through activities like the "Protein Synthesis Pizza," where students learn transcription and translation by constructing a pizza from DNA, mRNA, and amino acids. It emphasizes the encoding of proteins in the human body, detailing the transcription of DNA to mRNA and the translation of codons into amino acids. A table highlights amino acids, their DNA triplets, and mRNA codons, showcasing synthesis variations.

    Thumbnail: Human blood cells photographed by an electron microscope.


    This page titled 2: Molecular Biology and Genetics is shared under a CC BY 1.0 license and was authored, remixed, and/or curated by Katherine E. Brent & Sydney Quinn Chizmeshya via source content that was edited to the style and standards of the LibreTexts platform.