A researcher who studies bilogical memrbanes wanted to know the diffusion constant of phospholipids in a particular membrane. she decided to do a FRAP experiment.  Answer the following question:   1. describe how the FRAP experiment is done    2. How is the diffusion constant D extracted from FRAP data?

Q: Determine whether each of the following items are characteristic of either simple diffusion,…

A: Membrane transport refers to the movement of molecules or ions across cell membranes. Cell membranes…

Q: Which of the statements about diffusion are true? Select all that apply.     A. Solutes diffuse from…

A: The movement of particles is dependent on multiple factors including the charge on particle,…

Q: In the experiment showing osmosis through a semipermeable membrane, 3 corn syrup mixtures are used.…

A: Osmosis is the movement of water from its region of higher concentration to its region of low…

Q: Consider a solute having a permeability coefficient of 10-6 m s-1 for the plasma membrane of a…

A: Diffusion is the process of movement of solutes from an area of high concentration to a low…

Q: If you shift cells from low temperature to high temperature what lipid would you expect to increase…

A: The biological membrane is primarily made up of phospholipids and cholesterol. The phospholipids…

Q: What does the graph show about the rate of diffusion? Rate of diffusion facilitated transport simple…

A: Here we need to tell about diffusion on the basis of this graph. We understand diffusion with the…

Q: how can osmosis be applied to the physiological principle of a controlled exchange of materials…

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Q: What major type of molecule contributes to the formation of the cell membrane and what biochemical…

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Q: 1. Two molecules that can pass easily through the plasma membrane, between phospholipids, include…

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Q: What variable(s) influence(s) whether a nonpolar molecule can move across a membrane by passive…

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Q: Contrast the plasma membrane characteristics of organisms in warm tropical regions to those living…

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Q: Choose from the dropdown menu, the description that best matches each of the components shown. A se…

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Q: Suppose you would like to serve crisp lettuce, but your lettuce has become limp. To make it crisp…

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Q: relationship between cell size and the efficiency of diffusion in a model cell

A: Answer: Cell size is limited by a cell's surface area to volume ratio.A smaller cell is more…

Q: A student put together the experimental setup up shown. The selectively permeable membrane is…

A: The given setup is about the passive transport. Diffusion is the movement of molecules (salute  or…

Q: develop a testable hypothesis about the effect of different alcohols on the permeability of…

A: A hypothesis is formulated based on a question, which in turn is based on an observation. Here, an…

Q: You have two solutions that are isosmotic to each other and to a cell. However, when testing for…

A: Tonicity can be explain as the measure of relative concentration of solute particles present both…

Q: which of the following method(s) will give you the correct final concentration of dye?

A: Answer is D. only methods 1 and 4 are accurate.

Q: The antifungal drug nystatin kills fungal cells in partthrough the formation of membrane pores that…

A: Nystatin is an antifungal medication which is used to treat Candida infections of the skin including…

Q: An animal cell has an internal concentration of 0.1M of NaCl. You place this cell into a solution…

A: The cell would shrivel as the solution present outside the cell is hypertonic to the cell as it…

Q: Which of the following will decrease diffusion rate (a.k.a. rate of flux) of a particle across the…

A: Introduction The transfer of a molecule from a high concentration area to a low concentration area…

Q: What is your prediction about the effect of temperature on rate of diffusion?

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Q: Explain how salt concentrations contribute to the cell membrane intergrity in cells?  What are the…

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Q: C Description of membrane structure BDiffusion of molecules through transport proteins ADifference…

A: The plasma membrane of the cell is made up of phospholipid bilayers that regulates the entry and…

Q: Both simple diffusion and facilitated diffusion B. facilitated diffusion C. simple diffusion D.…

A: The transport of molecules from one area to the other is mainly carried out by two processes. One…

Q: For a lab on diffusion and osmosis, where a egg yolk was placed in a cup water the following…

A: The movement of water inside an egg yolk is influenced by the principles of osmosis. Osmosis is the…

Q: Is the solute potential of the cell increased or decreased by plasmolysis? Explain your answer.

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Q: List three mediator proteins that move phospholipid molecules from one side of a membrane to the…

A: Mediator proteins are the proteins that are required for the transport of molecules which cannot…

Q: The plasma membrane of P. bursaria is about 56%56% protein and 40%40% phospholipid by weight. How…

A: Lipoproteins are complex lipids made up of cholesteryl ester and triacylglycerol encased in an…

Q: Compare and fully explain simple diffusion and facilitated diffusion of solutes across a plasma…

A:

Q: A hypothetical molecule X+ is important for cell function and is present outside of a cell. List the…

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Q: A student designed an experiment to test whether different concentration gradients affect the rate…

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Q: In a monolayer of cultured epithelial cells, the cells may or may not have formed tight junctions.…

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Q: What is the difference between passive diffusion and facilitated diffusion?

A: Facilitated diffusion is a form of passive diffusion of molecules across a cell. In passive…

Q: Two dyes were placed on a medium that allowed for diffusion. The molecular weight of dye A is 793…

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Q: what may be the effect of ethanol to specific components of the cell membrane? How will this affect…

A: ANSWER;- Effect of ethanol on specific components of the cell membrane;- Ethanol is a non-polar…

Q: Simple and facilitated diffusion differ because _____________. simple diffusion requires the…

A: The process of movement of particles or ions across the semipermeable membrane from the region of…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.