A protein diffuses 40μg in water in one second (1- dimensional diffusion). What is the diffusion...
A protein diffuses 40μg in water in one second (1- dimensional diffusion). What is the diffusion coefficient in cm^2/s?
A. 16 x 10 ^ -6 cm^2/s
B. 8 x 10 ^ -6 cm^2/s
C. 4 x 10 ^ -6 cm^2/s
D. 2 x 10 ^ -6 cm^2/s
E. 32 x 10 ^ -6 cm^2/s
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A protein diffuses 40μg in water in one second (1- dimensional
diffusion). What is the diffusion...
Problem 6 - Protein Diffusion. Using Fick's second law of diffusion determine the time scale for...
Problem 6 - Protein Diffusion. Using Fick's second law of diffusion determine the time scale for the protein lysozyme (MW=141 kg/mol) to diffuse a root-mean-squared distance of 10 um in three-dimensional space. You may assume that its diffusion coefficient is 10-6 cm2/s at 1 atm and 273 K.
Determine the diffusion coefficient for glycerine in H 2 O using the following observations: glycerine diffuses along a...
Determine the diffusion coefficient for glycerine in H 2 O using the following observations: glycerine diffuses along a horizontal, water-filled column that has a cross-sectional area of 2.0 cm 2 . The density step across ∆r /l is 3.0 × 10 −2 kg/m 4 and the steady-state diffusion rate is 5.7 × 10 −15 kg/s.
15. What is the diffusion coefficient (m/s) in water at 25°C of a bovine pancreas ribonuclease...
15. What is the diffusion coefficient (m/s) in water at 25°C of a bovine pancreas ribonuclease (an enzyme that digests RNA) whose molecular weight is 1.369x109 and which is spherical?, Assuming the protein is an unhydrated sphere and its density is 1.414 g/cm'. The viscosity of water is 10- Pas. [Hint: Calculate the radius of the protein and use the Einstein relation to estimate the diffusion coefficient.] (10 pts)
Question 1c: Consider steady–state one dimensional diffusion and convection across a membrane of thickness L. No...
Question 1c: Consider steady–state one dimensional diffusion and convection across a membrane of thickness L. No chemical reactions are occurring. At z=0, C = Φ C0 and at z=L, C = Φ CL, where Φ is the partition coefficient of solute in the membrane. The convection velocity through the membrane is Vz= 1 x10-6 m2/s. Find out concentration in the middle of the membrane (z=L/2). L= 100 μm. Diffusion coefficient in the membrane is 1 x10- 10 m2/s. C0= {C0}...
Calculate the diffusion coefficient for the protein cytochrome c in aqueous solution assuming sphericity and using...
Calculate the diffusion coefficient for the protein cytochrome c in aqueous solution assuming sphericity and using the Stokes-Einstein equation at 25degree C. The hydrodynamic radius is R =19.0 Angstroms. The viscosity of water is 1.00 cP = 0.00100 kg/m-s. D_cytc =__m^2/s. If the critical reaction distance is the sum of their radii, what value is expected for the Smoluchowski theory second order rate constant for a diffusion controlled reaction between two cytochrome c's? k_d = Lmol^-1s^-1 What would be the...
a) What is the diffusion coefficient (DHCi) at 99 °C for a very dilute solution of hydrogen chloride, HC, in water? The...
a) What is the diffusion coefficient (DHCi) at 99 °C for a very dilute solution of hydrogen chloride, HC, in water? The ionic diffusion coefficients in water at 25°C are 9.31 X 105 cm2/s for H and 2.03 X 105 cm2/s for Cl. Start this problem by calculating the ionic |diffusion coefficients at 99 °C from those given at 25 °C assuming the viscosity of water at 25 °C and 99 °C is the same. Assume there is no current...
The diffusion coefficient, D, of a rigid spherical molecule is given by the equation KT Dua 6 where n is the viscos...
The diffusion coefficient, D, of a rigid spherical molecule is given by the equation KT Dua 6 where n is the viscosity of the solvent, r is the radius of the sphere, k is the Boltzman constant 1.38 x 10-6 erg.K-, and T is the absolute temperature in kelvins. Assume that this protein is an unhydrated, rigid sphere with a density, p, of 1.35g.cm . Calculate the diffusion coefficient of a 100 kDa protein in a membrane that has an...
Diffusion: Which following statement is incorrect? Select one: a. Facilitated diffusion requires a transport protein b....
Diffusion: Which following statement is incorrect? Select one: a. Facilitated diffusion requires a transport protein b. It is a form of passive transport c. Isotonic solutions have an equal amount of solute on both sides of the membrane - no change in shape d. Exocytosis involves the diffusion of molecules out of a cell e. Hypotonic solutions result in cell swelling
The degeneracy of the second energy level of three-dimensional box is Select one: 0.4 b.1 C....
The degeneracy of the second energy level of three-dimensional box is Select one: 0.4 b.1 C. 3 O d.5 e. 2 2 Evaluate the kinetic energy of a free proton described by the wavefunction e k = 5 nm Mass of an electron - 9.1 x 10 31 kg out of Select one
The degeneracy of the second energy level of three-dimensional box is Select one: 0.4 b.1 C....
The degeneracy of the second energy level of three-dimensional box is Select one: 0.4 b.1 C. 3 O d.5 e. 2 2 Evaluate the kinetic energy of a free proton described by the wavefunction e k = 5 nm Mass of an electron - 9.1 x 10 31 kg out of Select one
Problem 6 - Protein Diffusion. Using Fick's second law of diffusion determine the time scale for the protein lysozyme (MW=141 kg/mol) to diffuse a root-mean-squared distance of 10 um in three-dimensional space. You may assume that its diffusion coefficient is 10-6 cm2/s at 1 atm and 273 K.
15. What is the diffusion coefficient (m/s) in water at 25°C of a bovine pancreas ribonuclease (an enzyme that digests RNA) whose molecular weight is 1.369x109 and which is spherical?, Assuming the protein is an unhydrated sphere and its density is 1.414 g/cm'. The viscosity of water is 10- Pas. [Hint: Calculate the radius of the protein and use the Einstein relation to estimate the diffusion coefficient.] (10 pts)
Calculate the diffusion coefficient for the protein cytochrome c in aqueous solution assuming sphericity and using the Stokes-Einstein equation at 25degree C. The hydrodynamic radius is R =19.0 Angstroms. The viscosity of water is 1.00 cP = 0.00100 kg/m-s. D_cytc =__m^2/s. If the critical reaction distance is the sum of their radii, what value is expected for the Smoluchowski theory second order rate constant for a diffusion controlled reaction between two cytochrome c's? k_d = Lmol^-1s^-1 What would be the...
a) What is the diffusion coefficient (DHCi) at 99 °C for a very dilute solution of hydrogen chloride, HC, in water? The ionic diffusion coefficients in water at 25°C are 9.31 X 105 cm2/s for H and 2.03 X 105 cm2/s for Cl. Start this problem by calculating the ionic |diffusion coefficients at 99 °C from those given at 25 °C assuming the viscosity of water at 25 °C and 99 °C is the same. Assume there is no current...
The diffusion coefficient, D, of a rigid spherical molecule is given by the equation KT Dua 6 where n is the viscosity of the solvent, r is the radius of the sphere, k is the Boltzman constant 1.38 x 10-6 erg.K-, and T is the absolute temperature in kelvins. Assume that this protein is an unhydrated, rigid sphere with a density, p, of 1.35g.cm . Calculate the diffusion coefficient of a 100 kDa protein in a membrane that has an...
The degeneracy of the second energy level of three-dimensional box is Select one: 0.4 b.1 C. 3 O d.5 e. 2 2 Evaluate the kinetic energy of a free proton described by the wavefunction e k = 5 nm Mass of an electron - 9.1 x 10 31 kg out of Select one
The degeneracy of the second energy level of three-dimensional box is Select one: 0.4 b.1 C. 3 O d.5 e. 2 2 Evaluate the kinetic energy of a free proton described by the wavefunction e k = 5 nm Mass of an electron - 9.1 x 10 31 kg out of Select one
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