The virulence of Vibrio cholerae is due to its
A. enterotoxin.
B. invasive enzymes.
C. neurotoxin.
D. capsule.
E. All of the above.
Answer: A
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A housekeeping gene is one that codes for a product that:
A. functions in removing dirt from the cell. B. is expressed differentially based on the needs of the cell. C. is expressed at a constitutive level. D. functions exclusively in cell membrane maintenance.
A biochemical synthesized in small quantities in one part of an organism and transported to another, where a target cell is affected is a(n)
A. spore. B. scion. C. enzyme. D. callus. E. hormone.
Which easily treatable STD goes untreated causing reproductive damage?
a. HPV b. HIV c. gonorrhea d. syphilis e. chlamydia
SiRNAs act primarily to inhibit
a. transcription, by binding to specific genes. b. transcription, by formation of heterochromatin. c. translation, by blocking ribosomal attachment. d. translation, by binding to an mRNA.