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TOPIC 7 > Switching genes off and on > Flashcards

Switching genes off and on Flashcards

1
Q

Describe transcription factors in turning genes on

A

Transcription factors activated and bind to promoter region forming a transcription intiation complex
Allows RNA polymerase to attach to gene

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2
Q

Describe epigenetics in turning genes on

A

Methyl group removed from DNA, repressor protein removed from promoter region or transcription factor

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3
Q

Describe epigenetics in turning genes off

A

Methyl group attaches to histone - more tightly wound
Methyl group attaches to DNA
RNA polymerase cannot attach

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4
Q

Describe transcription factors in turning genes off

A

Repressor molecule attached to promoter region or transcription factor preventing transcription initiation complex forming

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TOPIC 7 (11 decks)

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