Gonococci require which of the following nutrients for growth?
a. Arginine
b. Hypoxanthine
c. Uracil
d. IsoVitaleX
D
N. gonorrhoeae is more fastidious than other species of Neisseria and requires an enriched choc-olate agar for growth on primary culture. An enrichment supplement, called IsoVitaleX, is added to chocolate agar in commonly used media.
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Hemostasis involves which blood component?
A. basophils B. platelets C. phagocytes D. monocytes E. neutrophils
__________ and _________ are released by neurons of the adrenal medulla and cause a fight-flight response.
Fill in the blank(s) with the appropriate word(s).
_____________is an infection of the skinfold around her fingernail
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about nucleosomes is true?
(a) Nucleosomes activate transcription when bound to the promoter. (b) Although RNA polymerase can access DNA packed within nucleosomes, the general transcription factors and transcriptional regulators cannot. (c) Histone acetyltransferases affect transcription by both altering chromatin structure to allow accessibility to the DNA and by adding acetyl groups to histones that can bind proteins that promote transcription. (d) Histone deacetylases remove lysines from histone tails.