A molecule takes 3.0 seconds to diffuse across a membrane. If the thickness of the membrane is doubled, then how long does it take the molecule to diffuse across the thicker membrane?
A molecule takes 3.0 seconds to diffuse across a membrane. If the thickness of the membrane...
A molecule will diffuse faster through a thinner membrane than it would diffuse through a thicker membrane. True false
A molecule is found to be able to diffuse across a membrane. Which of the following characteristics would best describe this molecule? Question options: hydrophobic negatively charged polar neutral hydrophilic
Suppose it takes 6.34 minutes for 1.00 mol of H2 to diffuse through a porous membrane under specific conditions of temperature and pressure. Calculate how long (in minutes) it will take 1.00 mol of O2 to diffuse through the same membrane under the same conditions.
Membrane Permeability a. What molecule makes up the majority of the cell membrane and how does its structure create the semi-permeable nature of the membrane? b. For each of the following molecules describe whether or not it can freely diffuse across a cell membrane. Justify your answers. RNA, Cholesterol, Carbon Dioxide (CO2), Sodium ions (Na+), please be as detail as possible.
If it takes 12.0 minutes for a sample of helium to completely diffuse through a room, how long will it take for a sample of nitrogen gas to diffuse at the same temperature?
12. Rank the following molecules in their ability to freely diffuse across the membrane (from 1- likely to 4- very unlikely) Large uncharged polar molecules, hydrophobic molecules, small uncharged polar molecules, ion.
How long on average would it take an oxygen gas molecule (02) to diffuse a distance of 15.0 mm in air? Hint: See Example 12.24
Q1. Earlier models of membrane transport models suggested that transport proteins binds a solute molecule or ion on one side of the membrane and then diffuse across the membrane to release the solute molecule on the other side. This transverse carrier model is later proven to be wrong. Suggest two reasons that argue against transverse carrier model. One of your reasons should be based on our current understanding of membrane structure and the other on thermodynamic considerations.
Osmosis differs from diffusion in that a specific molecule is moving across a membrane layer. What is this molecule?
the movement of a particular amino acid across the cell membrane is impaired when a molecule chemically similar to the amino acid is added to the extra cellular fluid. The movement of the acid through the membrane is by: