Which of the following is nota mechanism for regulating gene expression before the mature RNA transcript is produced?
A. mRNA splicing
B. protein degradation
C. attenuation of transcription elongation
D. modification of mRNA termini
B
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On which of the following DNA strands would UV radiation have the most effect?
A. AACCGGG B. TATATACG C. AUAUCGAU D. AATTAGTTC E. TATATACG AND AATTAGTTC
The time from when pathogen first enters the body and begins to multiply, until symptoms first appear is the ________.
A. period of invasion B. convalescent stage C. prodromal stage D. incubation period
Predict the outcome of an F+ to F? mating if the F+ cell lacked a functional tra operon.
A. There would be no effect on conjugation. B. Conjugation would occur, but the F- recipient could not become Hfr. C. Conjugation would not occur because there would be no contact between the F+ and F? cells. D. Upon entering the recipient, the F factor would be unable to integrate into to host chromosome.
What components do all cells possess?
What will be an ideal response?