The process of activating sludge from waste water involves
A. chlorination.
B. heat and pressure.
C. radiation.
D. filtration.
E. aeration and stirring.
Answer: E
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All of the following are glial cells except
A) interneurons. B) oligodendrocytes. C) astrocytes. D) Schwann cells. E) both choices A and D
Which neurotransmitter functions to elevate mood?
a. acetylcholine b. epinephrine c. dopamine d. serotonin e. GABA
In Drosophila, sex determination is carried out by
A) a cascade of alternative splicing. B) the SRY gene. C) histone modification. D) the DMRT1 gene. E) All of these
Colchicine is a toxin that binds to tubulin proteins and prevents microtubules from elongating. What effect might this have on dividing cells?
A. Replicated chromosomes will not be able to stick together, so sister chromatids will not properly sort into daughter nuclei. B. Cells will be able to complete mitosis, but cytokinesis will not occur. C. Chromosomes will not be able to condense, so mitosis will not occur. D. Sister chromatids will not be properly separated into separate daughter cells. E. The cell will not be able to move past the restriction point, so DNA will not be replicated.