The action of a new drug is unknown, so you test various aspects of eukaryotic cell processes looking for an effect. You notice that the survival of cells exposed to this drug is very low
Further analysis shows that some proteins and mRNAs are much longer than they should be. One hypothesis is that the drug interferes with
A) transcription termination signals.
B) spliceosome activity.
C) ribosomes.
D) nucleoli.
E) either transcription termination signals or spliceosome activity.
Answer: E
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In the figure above, what can be stated about species diversity and latitude?
A) As latitude increases, diversity decreases. B) As latitude decreases, diversity decreases. C) Species diversity is independent of latitude. D) Species diversity and latitude cannot be compared using this figure.
How many times must the centrosomes replicate in order for meiosis to occur?
A. once B. twice C. four times D. Centrosomes do not replicate.
The blood type A can be produced with what genotypes?
A. AO B. AB C. BA D. OO E. BB
The implanted blastula prevents ________ by secreting the hormone ________
a. menstruation, HCG b. gastrulation, HCG c. cleavage, progesterone d. menstruation, progesterone e. menstruation, estrogen