An Hfr cell can initiate chromosome transfer from one E. coli to another
Indicate whether the statement is true or false
TRUE
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Cholera is an example of a pandemic disease that
A) has multiple wild animal reservoirs and is thus difficult to eradicate. B) spreads from a common source and could be controlled with adequate clean water and waste sanitation measures. C) is spread through direct contact and has only a human reservoir. D) has recently emerged due to overcrowding in urban centers.
Mammals and birds are descendents of reptiles, but are not included within the taxon Reptilia. As a taxon Reptilia is...
A. monophyletic. B. polyphyletic. C. paraphyletic. D. a supergroup. E. a kingdom.
Proton pumps are used in various ways by members of every domain of organisms: Bacteria, Archaea, and Eukarya. What does this most probably mean?
A) Proton gradients across a membrane were used by cells that were the common ancestor of all three domains of life. B) The high concentration of protons in the ancient atmosphere must have necessitated a pump mechanism. C) Cells of each domain evolved proton pumps independently when oceans became more acidic. D) Proton pumps are necessary to all cell membranes.
Your research team has been asked to quantify levels of cellular RNAs in rats before and after exercise. The primary focus of your work will be to analyze the
A. transcriptome. B. nucleosome. C. proteome. D. spliceosome. E. different RNA motifs.