In yeast in the presence of galactose, you unexpectedly find that transcription is still blocked. Assuming Gal80 is present and functional, which other protein may be mutated to prevent transcriptional activation?
A) Gal2
B) Gal3
C) Gal4
D) Mig1
E) Gal10
B
You might also like to view...
During a particular period of physiological crisis, imagine that your carbon dioxide levels increase sharply, and consequently your blood pH decreases. Predict what will happen to the affinity of your hemoglobin for oxygen in this situation.
A. The affinity for oxygen by hemoglobin is constant- it does not change. B. The affinity for oxygen by hemoglobin will increase. C. The affinity for oxygen by hemoglobin will decrease.
Which of the following is used to describe the openings to the hearts in animals with open circulatory systems?
a. atria b. ostia c. septa d. ventricles
While innate immunity is ancient and universal amongst animals, the adaptive immune system is generally considered to be unique to the vertebrates. However, some researchers have suggested, with much controversy, that invertebrates may have a form of adaptive immunity as well. What sort of evidence would be required to fully demonstrate such a claim? (Check all that apply.)
_____ B and T cells _____ CD4 receptors _____ efficacy of vaccination _____ highly variable molecules that can bind various antigens _____ identified cells that are necessary to provide acquired immunity _____ immunoglobulin molecules _____ resistance upon second exposure to a pathogen _____ specific resistance to one strain but not another after exposure _____ thymus gland _____ Toll-like receptors
The female gametophyte generation in angiosperms is found in the:a
antheridium. b. stigma and style of the pistil. c. prothallium. d. megasporophyte of the cones. e. ovule of the ovary