A loss of function mutation in the gene for the yeast regulatory protein GAL4 causes yeast to grow poorly on galactose. What is the function of GAL4? It is an enzyme that metabolizes galactose It is a transcriptional repressor that prevents expression of yeast galactose digesting enzymes. It is a product that binds and activates a transcriptional repressor. It is a transcriptional activator for the galactose-digesting enzyme genes. It is a substrate that binds and inactivates a transcriptional activator.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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A loss of function mutation in the gene for the yeast regulatory protein GAL4 causes yeast to grow poorly on
galactose. What is the function of GAL4?
It is an enzyme that metabolizes galactose
It is a transcriptional repressor that prevents expression of yeast galactose digesting enzymes.
It is a product that binds and activates a transcriptional repressor.
It is a transcriptional activator for the galactose-digesting enzyme genes.
It is a substrate that binds and inactivates a transcriptional activator.
Transcribed Image Text:A loss of function mutation in the gene for the yeast regulatory protein GAL4 causes yeast to grow poorly on galactose. What is the function of GAL4? It is an enzyme that metabolizes galactose It is a transcriptional repressor that prevents expression of yeast galactose digesting enzymes. It is a product that binds and activates a transcriptional repressor. It is a transcriptional activator for the galactose-digesting enzyme genes. It is a substrate that binds and inactivates a transcriptional activator.
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