What type of protein is PTEN, which is mutated in 50% of prostate cancers?
A) kinase
B) phosphatase
C) growth factor receptor
D) G protein
E) ubiquitin ligase
Answer: B
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Features that are useful for identification of fungal species include
A. presence of a membrane bound nucleus. B. size, shape color and number of spores. C. ability to produce chlorophyll a. D. All of the choices are correct.
If a microbiologist is studying a specimen at a total magnification of 950X, what is the magnifying power of the objective lens if the ocular lens is 10X?
A. 95X B. 940X C. 950X D. 9500X
Which of these acts as a countercurrent multiplier?
a. collecting duct b. glomerulus c. loop of Henle d. vasa recta
The mass number of an atom is:
A. the number of neutrons only B. the number of protons plus the number of neutrons C. the number of electrons plus the number of protons D. the number of electrons, plus the number of neutrons, plus the number of protons E. the number of protons only