Which are considered true enteric pathogens?
What will be an ideal response?
Salmonella; Shigella.
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The effector molecule for the Trp repressor of the trp operon is:
A. tyrosine. B. lactose. C. arabinose. D. tryptophan.
Over 90% of Staphylococcus aureus bacteria can withstand the effect of penicillin. Why?
A. They produce Beta-lactamase. B. Cell division occurs in successively different planes, and the daughter cells remain attached to one another. C. They produce coagulase. D. They have loosely organized polysaccharide slime layers. E. They produce staphylokinase, which dissolves fibrin threads in blood clots
If wire hair (W) is dominant to smooth hair (w), and
you find a wire-haired puppy, how would you determine its genotype by a genetic breeding experiment? Give both the genotype and phenotype involved with the cross with the unknown. What will be an ideal response?
This type of plant provides nearly all of the non-meat food for the human population.
A. angiosperms B. algae C. bryophytes D. gymnosperms