A solution contains 0.0000001 (10-7 ) moles of hydroxyl ions [OH-] per liter. Which of the following best describes this solution?
A) acidic: H+ acceptor
B) basic: H+ acceptor
C) acidic: H+ donor
D) neutral
D
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What genes appear to be controlled by the Xic?
A. Xist and Tsix B. Xist only C. Tsix only D. None of these
Melvin Calvin and his colleagues used which of the following to deduce the steps in the Calvin-Benson cycle?
A) negative staining B) Drosophila melanogaster C) electron microscopy D) ultracentrifugation E) radioisotopes
The second messenger inositol triphosphate (IP3) appears to be involved in stomatal closure triggered by ____
a. auxins b. abscisic acid c. oligosaccharins d. salicylic acid e. gibberellins
What is the most common cause of kidney failure?
a. long-term high-dose aspirin b. chronic high blood pressure and diabetes c. genetic predisposition d. pesticides e. lead