The length of time a Gprotein will signal is determined by _______
(a) the activity of phosphatases that turn off Gproteins by dephosphorylating G?.
(b) the activity of phosphatases that turn GTP into GDP.
(c) the degradation of the Gprotein after G??separates from G???
(d) the GTPase activity of G??
(d)
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Along with the egg, in the part of an embryo sac next to the micropyle you should find ____
a. the central cell b. a seed c. the pollen tube d. synergids e. antipodal cells
If the decolorizer is not left on long enough in the Gram-staining procedure, gram-positive organisms will be stained ________ and gram-negative organisms will be stained ________.
A. purple; colorless B. purple; purple C. purple; pink D. pink; pink
XY individuals with total androgen
insensitivity syndrome
a. do not secrete testosterone. b. secrete testosterone but the testosterone is ineffective. c. have mutated testosterone receptors in their cells. d. secrete more estrogen than testosterone. e. have normal male genitalia
The __________ can be considered a sorting, processing and packaging center
a. centriole b. centrosome c. Golgi complex d. vacuole e. cytoskeleton