The red color in a positive methyl red test indicates that the
A. pH measurement is irrelevant
B. pH is decreased to 4.0 or less
C. pH is decreased to 4.4 or less
D. pH is increasedc
Ans: C. pH is decreased to 4.4 or less
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Serious acute cases of diphtheria are treated with antibiotics and
A) diphtheria antitoxin. B) diphtheria toxin. C) diphtheria toxoid. D) diphtheria antitoxin, diphtheria toxin, and diphtheria toxoid.
Describe the apoptotic pathway in mammalian cells.
A. Apaf1 inhibits Bcl2, Caspase-8 or 9 is activated, caspases degrade cell components B. Bcl2 activates Apaf1, Caspase-8 or 9 is inhibited, caspases degrade cell components C. Apaf1 activates Bcl2, Caspase-8 or 9 is activated, caspases degrade cell components
Which branch of this phylogenetic tree identifies a kingdom?
a. C b. D c. E d. D and E e. C, D, and E
During M phase of the cell cycle, an important event that occurs is that the cytoplasm is "settled down" by MAPK becoming active in an existing background of active MPF.
a. true b. false