Micro RNAs (miRNAs) are important in ____
a. alternative splicing
b. transcriptional activation
c. chromatin remodeling
d. genomic imprinting
e. RNA interference (RNAi)
ANSWER: e
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While electron transport is occurring, the development of a(n) ________ is established by the directional pumping of protons across the inner membrane of the mitochondrion.
Fill in the blank(s) with the appropriate word(s).
Growth of pathogens in a food generally does not result in perceptible changes in the quality of the food but the ingestion of this food can result in
A. spoilage. B. foodborne illness. C. aging. D. toxin infection.
Which of the following types of cells does HIV preferentially infect?
A) cytotoxic T cells B) natural killer cells C) helper T cells D) phagocytic cells
Type S Streptococcus pneumoniae bacterium is lethal and will kill its host. If heat inactivated the S strain dies and becomes nonlethal. Type R Streptococcus pneumoniae is a nonvirulent strain of bacteria. What would occur if one were to inject both the R strain and heat-killed S strains into a host organism such as the mouse?
A. The R strain would be transformed into the virulent S strain and kill the host. B. The R strain would be transformed into the virulent S strain and not affect the host. C. The S strain would be transformed into the nonvirulent R strain and kill the host. D. The S strain would be transformed into the nonvirulent R strain and not affect the host. E. Neither the S nor the R strain would change.