A(n) _____________________ depicts the evolutionary relationships between related species
Fill in the blank(s) with correct word
phylogenetic tree
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Phosphorylation cascades involving a series of protein kinases are useful for cellular signal transduction because they _____
A) are species specific B) always lead to the same cellular response C) amplify the original signal many times D) counter the harmful effects of phosphatases E) use a small and fixed number of molecules
Which of the following statements about mRNAs and microRNAs is false?
A. Both are transcribed by RNA Pol II. B. Both are capped and polyadenylated. C. Both undergo nucleolytic cleavage in the nucleus and the cytoplasm. D. Both are processed via interaction with snoRNPs.
A temperate phage
A. may be lysogenic. B. may be lytic. C. enters a lysogenic or lytic life cycle shortly after entering the host cell. D. are all RNA viruses. E. may be lysogenic AND enters a lysogenic or lytic life cycle shortly after entering the host cell.
An example of an "emerging virus" (a virus in a new host) with a lethality rate in excess of 50% is
A. influenza virus. B. Ebola virus. C. yellow fever. D. hepatitis B. E. variola virus.