actin filament would a myosin molecule need to ratchet in order to contract a cell by approximately 1 μm? How fast could a non-muscle cell make this contraction compared to a muscle cell if the relative rates of myosin walks on F-actin ar
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How many actin monomers within an actin filament would a myosin molecule need to ratchet in order to contract a cell by approximately 1 μm? How fast could a non-muscle cell make this contraction compared to a muscle cell if the relative rates of myosin walks on F-actin are 4.5 μm/sec and 0.04 μm/sec for myosin II and I respectively?
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- A very thin layer of oil floats on top of water. A drop of dye is placed at the center of the oil. The dye diffuses through the oil in all directions equally with a diffusion constant D0. Since the layer of oil is thin, we can assume the diffusion is two-dimensional. After a time T0 has passed, the dye has diffused a distance of 5 mm. If the dye had a diffusion constant of D0/3 what distance would the dye have diffused after a time T0/4? Give your answer in units of mm. (Round your answer to two decimal places.)You can smell perfume very shortly after opening the bottle. To show that it is not reaching your nose by diffusion, calculate the average distance a perfume molecule moves in one second in air, given its diffusion constant D to be 1.00 • 10–6 m2/s.Numeric : A numeric value is expected and not an expression.xrms = __________________________________________The thickness of the membrane that surrounds an alveolar sac is 300 µm. How long does it take (ms) for a molecule of oxygen to cross from one side of the alveolar sac to the other? Assume of 2.5*10^-6 m^2/s for O2 in the barrier. Assume 3d diffusion.
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