Adherens junctions and desmosomes may be distinguished from each other on the basis of
a. the presence of cadherins versus ICAMs.
b. the linkage of cadherins either to actin filaments or to intermediate filaments, respectively.
c. whether the cadherins are linked directly or indirectly to the cytoskeletal elements.
d. whether the linkage is between two cells or between a cell and the extracellular environment.
Ans: b. the linkage of cadherins either to actin filaments or to intermediate filaments, respectively.
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If a testcross for two different traits produces more nonrecombinant than recombinant offspring, then the alleles for the two traits
A. are dominant. B. are on the same chromosome. C. are on different chromosomes. D. are epistatic. E. are both dominant and on the same chromosome.
Compare the composition, structure, and function of cilia and flagella
What will be an ideal response?
One function of cortical parenchyma cells is:
a. photosynthesis. b. to provide structural support and strength. c. to produce cutin. d. to conduct water and nutrient minerals. e. to conduct sugars.
What mechanism is used by a bacterial cell to fit its DNA into the nucleoid region?
A. tight wrapping around histones to form nucleosomes B. the formation of loop domains, supercoiling by topoisomerases, and tight wrapping around histones to form nucleosomes C. the formation of loop domains and supercoiling by topoisomerases D. the formation of loop domains E. supercoiling by topoisomerases