What type of junctional complex will prohibit paracellular transport?
Tight junctions
Adherens junctions
Desmosomes
Gap junctions
tight junctions
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The enzyme lysozyme offers protection from some ____ by breaking down their ____
a. viruses; protein coat b. bacteria; cell walls c. viruses; envelopes d. bacteria; DNA e. viruses and bacteria; nucleic acids
Crossing over
a. generally results in binary fission. b. involves centrioles. c. involves breakages and exchanges between sister chromatids. d. results in new combinations of alleles being channeled into the daughter cells. e. does all of these.
Which of the following elements is most likely to carry a +1 charge in its ionic state?
A. Silicon B. Barium C. Argon D. Nitrogen E. Potassium
Receipt of extracellular signals can change cell behavior quickly (for example, in seconds or less) or much more slowly (for example, in hours)
A. What kind of molecular changes could cause quick changes in cell behavior? B. What kind of molecular changes could cause slow changes in cell behavior? C. Explain why the response you named in A results in a quick change, whereas the response you named in B results in a slow change.