What are four ways that mRNA can be modified?
What will be an ideal response?
(1 ) Adding a modified guanine to the 5? end, (2 ) adding a polyadenylation tail to the 3? end, (3 ) splicing of introns, and (4 ) RNA editing.
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Members of the genus Thiothrix are sheathed bacteria that can replicate by releasing gonidia from the open end of the sheath.
Answer the following statement true (T) or false (F)
Worldwide declines in the population size of frogs have recently been linked to ____
a. overharvesting b. a fungus
c. dams d. decreases in global temperatures e. increases in precipitation
All of the following statements apply to G proteins EXCEPT ____
a. G proteins transmit a signal from the cell surface to the interior of the cell b. all G proteins have a similar structure c. G proteins do not use a second messenger but transmit the signal directly to the nucleus d. G proteins act to amplify the signal creating a cascade response in the cell e. G proteins are the target of toxins released by some pathogenic bacteria
The correct sequence of events in viral multiplication is
A. uncoating, penetration, synthesis, assembly, absorption, and release. B. adsorption, penetration, uncoating, synthesis, assembly, and release. C. adsorption, release, synthesis, uncoating, assembly, and penetration. D. assembly, synthesis, uncoating, release, penetration, and adsorption. E. penetration, uncoating, synthesis, adsorption, assembly, and release.