The standard or housekeeping sigma factor used most often by E. coli RNA polymerase under normal growth conditions is called sigma ________.
A. S
B. E
C. 70
D. 32
Answer: C
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A 26-year-old woman who has a Gardnerella vaginalis infection becomes immunocompromised, which causes the organism to enter the bloodstream. She has several fever spikes; therefore blood cultures are drawn and placed in blood culture media containing sodium polyanethol sulfonate (SPS). After 5 days of incubation, the blood cultures are negative. Which of the following statements explains this
discrepancy? a. G. vaginalis stays localized in the female genital tract and does not enter the blood-stream. b. The blood culture media is most likely expired. c. The automated blood culture system is most likely not correctly functioning. d. G. vaginalis is usually inhibited by this anticoagulant, making recovery difficult.
Which codons are synonymous?
A) CAC and CAG B) CAC and CAU C) ACA and AGC D) UCC and GAC
Cellular slime molds can be distinguished from plasmodial slime molds on the basis of ____
a. reproductive structures b. spore formation c. number of nuclei per cell d. slime trails e. food requirements
TFIID binds to the ____________ box and helps recruit RNA polymerase II to the core ___________
Fill in the blank(s) with the appropriate word(s).