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- In what situation(s) would a transmission electron microscope be ideal, and why?U-Tube Diagram The following diagram illustrates a U-shaped tube that contains a semi-permeable membrane that separates the left and right sides. In figure A, the left side contains water (blue) and the right side contains a solution (red). After 24 hours, the results are illustrated in figure B. a) b) 1. Does the semi-permeable membrane allow for the movement of solution? What is your evidence? 2. Does the semi-permeable membrane allow for the movement of water? What is your evidence? 3. Has the left and right side of the tube reached equilibrium? What is your evidence? 4. Explain how the experiment demonstrates osmosis. Include tonicity (hyper, hypo, or iso) in your explanation.a. What is the main class of proteins that cells use to adhere to theextracellular matrix? b. How many proteins are in this family? c. What are some ECM proteins that they bind? (answer a, b, and c)
- a. How does the vesicle carrying Smoothened fuse to the plasma membrane? Describe thesteps, including the role of all proteins involved. Drawings may be helpful. b.r^2=6Dt , where D is the diffusion coefficient of thediffusing object and t is the time that the object is allowed to diffuse. If the diffusion coefficient, D, of a small protein is 5 x 10^-10 m2 s-1, how long (on average) does ittake for the protein to diffuse across a parasitic wasp that is 189 um long ?In what situation(s) would the use of a scanning electron microscope be ideal, and why?
- During a microscopy exercise in the anatomy laboratory,a student makes the following observations about a tissuesection: (1) The section contains some different types ofscattered protein fibers—that is, they exhibit differentwidths, some are branched, some are long and unbranched,and their staining characteristics differ (some are seenonly with specific stains). (2) Several cell types withdifferent morphologies are scattered throughout the section,but these cells are not grouped tightly together. (3) Theexamined section has some “open spaces”—that is, placesbetween cells and the observed fibers in the section thatappear clear with no recognizable features. What type oftissue is the student observing? Where might this tissue befound in the body?With regard to cytoskeletal structure and function, a) Outline the structure and organisation of cytoskeletal proteins in a eukaryotic, epithelial cell.Detail explainatory solution required
- Please answer.... a) State which series depcit tubes that were placed in isotonic, hypertonic, and hypotonic environments. b) In the above graph, which tubes appear to show internal turgor pressure counteracting osmosis? Explain how you can tell this by looking at the graph.What does an ‘I’ result mean in disk diffusion susceptibility test? answer is intermediate please help to explainQuantitative – diffusion time: Consider a spherical, single-celled organism which needs oxygen tosurvive. a. Assume oxygen needs to diffuse from the outside of the cell to its center. Write an equation thatgives the diffusion time in terms of the cell radius. b. The cell has a 4 micron (m) diameter, and diffusion coefficient of oxygen is 1.8 x 10-5 cm2/s inwater (assume diffusion is the same through the cell membrane). How long does it take for oxygento diffuse to the center of the cell? c. Cells typically need key molecules such as oxygen to survive. Diffusion times of oxygen can limithow big cells can become. If the cell gets too large for oxygen to reach its center, the cell coulddie. Calculate the size of a cell at which oxygen diffusion time becomes too slow and so limits theability of the cell to get that big. Explain your assumptions. How does this compare to typical cellsizes?