The global repression of GAL gene expression by Mig1 occurs when:
A. glucose is low and Mig1 is localized to the nucleus.
B. glucose is present and Mig1 is phosphorylated to prevent nuclear localization.
C. glucose is present and Mig1 associates with Tup1.
D. glucose is low and Mig1 binds directly to RNA Pol II.
C
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Members of this lineage of flatworms are free-living and are found mostly in marine environments
Most acquire food with a muscular pharynx and are hermaphroditic.
a. Trematoda b. Turbellaria c. Polychaeta d. Cestoda e. Hirudinea
The eukaryotes first appear in the fossil record
about ____ million years ago.
a. 1.8 b. 2.2 c. 2.7 d. 3.6 e. 1.5
Which of the following substances is NOT normally
filtered from the blood? a. water b. plasma proteins c. urea d. glucose e. sodium
Exotoxins:
A. Are made of protein B. Are always enzymes C. Are present in Gram-positive bacteria only D. All of the above E. None of the above