Blood flows most slowly through the _______.
a) aorta
b) veins
c) arteries
d) heart
e) capillaries
Ans: e) capillaries
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The lowermost and outermost whorl on a floral shoot consists of petals
____________________ Indicate whether the statement is true or false.
Which of the following would you expect to observe in an in vitro experimental mixture containing microtubules anchored by their minus ends to centrosomes, polystyrene beads with kinesin or dynein motors attached, and ATP?
A) movement of kinesin-attached beads along microtubules away from centrosomes B) movement of dynein-attached beads along microtubules toward from centrosomes C) movement of beads in either direction along a single microtubule D) removal of ATP stopping all bead movement along microtubules E) All would be expected.
Immunofluorescence methods can be carried out with antibodies that directly recognize the protein of interest. The indirect method is different because it requires that the antibody to the protein of interest be:
A. attached to a fluorochrome. B. detected by a second antibody that is attached to a fluorochrome. C. detected by a second antibody that recognizes the fluorochrome. D. detected by a secondary antibody attached to luciferase. E. detected by a secondary antibody attached to luciferin.
A gram-negative bacillus that is hydrogen sulfide (H2S)-positive, citrate-positive, spot in-dole–negative, and associated with gastroenteritis in the United States is most likely:
a. K. pneumoniae. b. P. vulgaris. c. Salmonella enteritidis. d. S. sonnei.