#Question id: 19212
#Unit 12. Applied Biology
#Question id: 2811
#Unit 2. Cellular Organization
RNA interference is a method for inhibiting the function of specific genes using
a. single-stranded DNA.
b. double-stranded DNA.
c. single-stranded RNA.
d. double-stranded RNA.
#Question id: 2346
#Unit 2. Cellular Organization
The removal of waste products from the amoeba is an example of
#Question id: 1385
#Unit 4. Cell Communication and Cell Signaling
The ability of a population of fibroblasts to migrate along the surface of a tissue culture dish depends on adhesion between the cell surface and the extracellular matrix molecules coating the dish. The dish is coated with laminin, and the only cell-surface protein capable of binding laminin is a cell-adhesion protein called an integrin. Integrins are integral plasma-membrane proteins that function as heterodimers. Under these conditions the rate at which a fibroblast can migrate along the laminin coated culture dish is proportional to the strength of adhesion between the cell and the laminin substrate. The table below lists the rate of cell migration observed for fibroblasts genetically engineered to generate the indicated phenotypes.
Which of the following is the most likely explanation for failure of overexpression of the integrin alpha subunit to alter the rate of fibroblast migration?
#Question id: 11200
#Unit 7. System Physiology – Animal
Action potentials are normally carried in only one direction: from the axon hillock toward the axon terminals. If you experimentally depolarize the middle of the axon to threshold, using an electronic probe, then ________.