Which of the following is the effect of atrazine
on cells?
a. they induce the conversion of testosterone
to estrogen
b. they block the production of cortisol
c. they enhance the production of melatonin
d. they cause the conversion of insulin into
glucagon
e. they prevent TSH from stimulating thyroid
hormone production
A
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Thiomargarita species store large amounts of ________ in huge internal vacuoles.
A. nitrate B. oxygen C. sulfate D. hydrogen sulfide
A rho-dependent terminator
A) forms a hairpin loop during termination. B) requires ATP to complete termination. C) is rich in AT nucleotides. D) Both A and B E) All of these
Chemical germicides
A. may react irreversibly with proteins/enzymes.
B. may react with cytoplasmic membranes or viral envelopes.
C. may be disinfecting or even sterilizing.
D. are sensitive to dilution factor, time of contact, and temperature of use.
E. All of the choices are true.
The ________ of the glomeromycetes do not penetrate host root cells; instead, the fungal hyphae grow between and around cells.
A. ectomycorrhizal hyphae B. stolon hyphae C. progametangia hyphae D. arbuscular mycorrhizal hyphae