Answer as directed: 1. Which melts at higher temperature? 18:0 or 18:2(Aº. 12) ? Explain. 2. Draw the structure of the wax composed of stearic acid and a straight-chained alcohol with 30 carbon atoms. 3. Considering the Fluid-Mosaic Model of cellular membranes, supply the biomolecules primarily responsible for the cellular properties.
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- 6:18 < BCH351_Assignment... 6.1. The graph below shows the fluidity of liposomes composed from 4 different phospholipid bilayers. Melting curve 'a' corresponds to a membrane composed of phosphatidate linked with hexadecanoate fatty acids. The melting temperature, Tm, for that membrane is indicated on the graph as a dotted vertical line. At temperatures below the Tm, the membrane becomes more gel-like and much less fluid than above the Tm. Curve b) The compositions of the other 3 liposomes are listed below (numbered 1-3). Match the liposome compositions to the different melting curves (labeled 'b', 'c' and 'd' on the graph). Explain your answers. 1) Phosphatidate composed of octadecanoate fatty acids 2) Phosphatidate composed of hexadecanoate fatty acids + cholesterol 3) Phosphatidate composed of 16:1cA³ fatty acids Curve c) 3 Curve d) Fluidity 5G UC.ll 90% a B Tm Temperature :12. 1 B be here to search Required Study the diagram of the cell in the solution shown in the beaker below. 90% H₂O 10% solute 85% H₂O 15% solute Which direction will the water move by osmosis? into the cell out of the cell both in and out of the cell no movement will occur n W DELLDiffusion experiments of a small molecule drug in tissue samples are performed. The drug has a radius of 2.24 nm and a pure-water diffusivity of 2.75 x 10^-6 cm^2/s. Cells occupy approximately 72% of the tissue byvolume. The molecule is very hydrophilic and does not readily cross cellular membranes. If you assume that the interstitial space is gel-like with a microstructure parameter k=3.7 x 10^-3 nm^-1, what is the effective diffusivity in the tissue?
- Indicate the contrast statements of the following chromatographic techniques of separation. A. A separation of components mixture based on migration rates in a stationary phase by a gaseous or liquid mobile phase. B. The supported materials coated of flat plate or in fibres of paper stationary phase is known as planar chromatography. C. The rate of migration of molecules or analytes is depending on the relative solubility of the solute in the stationary phase and mobile phase. D. Involve an electronic transition of valence shell electron in free atoms to provide analytical information about sample composition.yeasts are able to produce high internal concentrations of glycerol to counteract the osmotic pressure of the surrounding media. suppose that a sample of yeast cells were placed in a 4% sodium chloride solution by weight. The density of solution is at 25 C = 1.02 g/ml, Molecular weight of solute = 58.44 g/mol, i of glycerol = 1 and R=0.08205 L-atm/mol-K What is the weight of solute in grams What is the moles of solute What is the volume of the solution in liters What is the molarity of the solution What is the value of the temperature to be used to solved for the osmotic pressure of the solution What is the osmotic pressure of solutionGive Explanation Detailed Solution of sub parts..(no need handwritten answer)
- 204solvent 55% solvent 5. For each of the situations below use arrows to indicate the net movement of sugar into or out of the cell. (ASsume that the sugar molecules can pass through the cell membrane in each case) 1% sugar 3% sugar 1% sugar 1% sugar 1% sugar 5% sugar 6. Are the scenarios above an example of diffusion or osmosis? Expla in. 9.in food microbiology, how do you compute for concentration (M) and absorbance (A) of peroxidase activity on hydrogen peroxide at different pH values? (wavelength used = 415nm). can you please explain the calculations thank you if given: Temperature = 75 C Molar absorptivity coefficient = 10.5 Path length (cm) = 2 I = transmitted light = 0.45Show the calculations required to make up 250mlof a stock solution of this chemical that will then be at the working concentration when 1 volume of this solution is added to 10 volumes of cell culture medium.
- DO NOT COPY THE ANSWER FROM THE SAME QUESTION. Sassa, a biology professor, wanted to demonstrate to her students the applicability of a dialyzing membrane (DM) as a model for the cell membrane by enclosing an aqueous solution in a DM bag and immersing in a beaker containing a different solution. Substances available which are permeable to the DM include 0.02 M NaCl, 0.03 M glucose, and 0.01 M glucose. The only substance available which is completely impermeable to the DM is the 0.01 M lactose. Using the substances given and materials such as a beaker, stirring rod, and string, draw ONLY ONE set-up that can be demonstrated by Ms. Sassa that will satisfy ALL of the following conditions:a. No solute will exhibit a net diffusion out of the cell.b. Glucose will exhibit a net diffusion into the cell.c. NaCl will exhibit a zero net d. No net movement of lactose from the inside to outside of the cell. Make sure to label properly the substance inside the beaker and inside the DM bag.Dextrose 5% in water solution is an example of hypertonic solution. True False?Stoichiometric equations can be used to represent the growth of microorganisms provided a 'molecular formula' for the cells is available. The molecular formula for biomass is obtained by measuring the amounts of C, N, H, O, and other elements in cells. For a particular bacterial strain, the molecular formula was determined to be C4.4H7.301.2No.86. These bacterial cells are grown under aerobic conditions with hexadecane (C16H34) as substrate. The reaction equation describing growth is: 1 C16H34 + 16.28 O2 +1.42 NH3 → 1.65 C4.4H7.301.2No.86 + 8.74 CO2+ 13.11 H20 You are in charge of a small batch fermenter for growing the bacteria you need to produce 8.2 kg of cells for inoculation of a pilot-scale reactor. a) What minimum amount of hexadecane substrate (in kg) must be contained in your culture medium? Assume 100% conversion of hexadecane to cells. b) What must be the minimum concentration of hexadecane (in kg/m3) in the medium if the fermenter working volume is 5.8 cubic meters? c) What…