Transcript Gene regulation Section 12- 5 Pages 309-312

Gene regulation
Section 12- 5
Pages 309-312
Regulation of genes
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Operon is a group /cluster of genes tha
work together
Lac genes turned on by lactose (enzyme)
and turned off by a repressor
Genes can use proteins to help speed up
transcription
ex.: open up a tightly packed chromatin
attracts the RNA polymerase
blocks access to a gene
TATA
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Unique to eukaryotic genes
Helps in regulation
Hox Genes
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Control development &
differentiation
Cell specialization
Tissue specialization
All are descended from the genes
of a common ancestor
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A group of genes that operates
together is a(an)
promoter.
operon.
operator.
intron.
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Repressors function to
turn genes off.
produce lactose.
turn genes on.
slow cell division.
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Which of the following is unique to the
regulation of eukaryotic genes?
promoter sequences
 TATA box
 different start codons
 regulatory proteins
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Organs and tissues that develop in
various parts of embryos are controlled
by
regulation sites.
 RNA polymerase.
 hox genes.
 DNA polymerase.
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