6.6 Cell Speciazlization and Gene Expression

Cards (11)

  • Negative regulatory molecules

    • Inhibit gene expression by binding to DNA and blocking transcription
  • Phenotypic differences in cells and organisms
    • Due to the combination of genes that are expressed
  • Gene expression differences account for phenotypic differences between organisms
  • Interaction of promoters and transcription factors
    • Determine phenotypic differences between tissues within an organism or between individual organisms
  • Small RNA molecules
    • Regulate gene expression post-transcription by either blocking transcription or by breaking down messenger RNA
  • Promoters are sequences upstream of the transcription start site where RNA polymerase and transcription factors bind to initiate transcription
  • Eye tissue cells contain regulatory proteins that interact with transcription factors to initiate transcription
  • Interaction of promoters and other transcription factors helps determine phenotypic differences between tissues within an organism or between individual organisms
  • Phenotypic differences in cells and organisms are due to the combination of genes that are expressed
  • Negative regulatory molecules inhibit gene expression by binding to DNA and blocking transcription
  • Small RNA molecules regulate gene expression post-transcription by either blocking transcription or by breaking down messenger RNA