WHAT IF? How would the membrane lipid composition of a native grass found in very warm soil aroundhot springs compare with that of a native grass foundin cooler soil? Explain.
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WHAT IF? How would the membrane lipid composition of a native grass found in very warm soil around
hot springs compare with that of a native grass found
in cooler soil? Explain.
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- % Change in Potato Core Mass Groups of students in a biology class conduct an experiment to explore the movement of water into and out of plant cells. Each group makes six potato cores and mneasures the initial masses of the cores. The groups submerge the potato cores in sucrose solutions of differing concentrations that range from 0.0 M to 1.0 M. After one hour, each group removes the potato cores from the solutions and measures the final masses of the cores. The initial and final masses of the potato cores are used to calculate a percent change in mass for each core to account for differences in the initial masses. The students generate a graph using the average percent change in mass for all the groups in the class for each solution. 20 10 0.0 0.2 0.4 0.6 0.8 1.0 -10 -20 -30 -40 Concentration of Sucrose (M) Based on the data collected, which solution concentration is isotonic to the potato core? O 0.0 M O 0.2 M O 0.6 M O 1.0 M.Consider a plant cell. The value for solute concentration in a plant cell is -0.12 MPa and the turgor pressure is 0.12 MPa. 1- What is the water potential in this plant cell? 2- If this plant cell were placed in a solution with water potential of -0.1 MPa, what would happen to the cell? (Hint: explain where the water goes and what that does to the cell).In each problem below draw an arrow showing which way water will move/flow. Is the solution hypertonic, hypotonic or isotonic? A A A B B в Concentration of sugar А 60% В 20% Concentration of sugar Concentration of sugar A 45% В 45% A 45% В 70% Solution is Solution is Solution is A A A B B B Concentration of sugar A 12% Concentration of sugar A 12% В 15% Concentration of sugar A 16% В 60% B 10% Solution is Solution is Solution is A A A B Concentration of sugar Concentration of sugar Concentration of sugar A 19% A 44% В 41% A 55% B 41% B 25% Solution is Solution is Solution is
- In the experimental conditions described below, how many molecules of dextrose do you have to add to the extracellular fluid in order to make it iso-osmotic relative to the intracellular fluid? Intracellular fluid: • Number of water molecules = 60 • Number of Dextrose molecules = 6 • Number of Sucrose molecules = 3 Extracellular fluid: Number of water molecules = 120 • Number of dextrose molecule = ???? • Number of Sucrose molecules = 0 %3D Enter the number of molecules of dextrose in your answer (format: for 7 enter 7 or 7.00, for 7.5 enter 7.5 or 7.50, for 7.3333 enter 7.33 etc...). Your Answer:In the experimental conditions described below, how many molecules of dextrose do you have to add to the extracellular fluid in order to make it iso-osmotic relative to the intracellular fluid? Pracice 7 Intracellular fluid: • Number of water molecules = 60 Number of Dextrose molecules = 8 • Number of Sucrose molecules = 2 Extracellular fluid: • Number of water molecules = 160 • Number of dextrose molecule = ???? • Number of Sucrose molecules = 0 Enter the number of molecules of dextrose in your answer (format: for 7 enter 7 or 7.00, for 7.5 enter 7.5 or 7.50, for 7.3333 enter 7.33 etc...). Your Answer: AnswerPotato lab osmosis - If you observed a negative percent change in mass for a potato core placed in a sucrose solution, is the sucrose solution isotonic, hypertonic, or hypotonic to the internal molarity of the potato?
- Consider a negatively charged protein adsorbed on anion-exchange gel at pH 8. (a) How will a gradient from pH 8 to some lower pH be useful for eluting the protein? (b) How would a gradient of increasing NaCl concentration (at constant pH) be useful for eluting the protein?3) A soil bacteria wishes to open a health spa where the air is not too dry but the premises don't flood frequently either. She is hoping for a soil with a relative humidity between 50-60%. A lawyer acquaintance (a real fungus) is trying to sell her some property. He boasts that the area has a year-round matric potential of about -6.5 MPa, an electrical conductivity (in the pore-water) of 5 dS/m, and a comfortable temperature of 15 oC. The hard-sell lawyer is pressuring her for a quick decision. Does the property meet her requirements?Explain why the curve is not completely matched when temperature rise and then fall We should put the oligomer into the water bath quickly after heating at 90 degree.
- 2. Mixtures of amino acids can be analyzed by first separating the mixture into its components through ion-exchange chromatography. Amino acids placed on a cation-exchange resin containing sulfonate (-SO₁) groups flow down the column at different rates because of two factors that influence their movement: (1) ionic attraction between the sulfonate residues on the column and positively charged functional groups on the amino acids, and (2) hydrophobic interactions between amino acid side chains and the strongly hydrophobic backbone of the polystyrene resin. For each pair of amino acids listed, determine which will be eluted first from the cation-exchange column by a pH 7.0 buffer. (a) Asp and Ly, (b) Arg and Met, (c) Glu and Val, (d) Gly and Leu, (e) Ser and AlaIn the experimental conditions described below, how many molecules of dextrose do you have to add to the extracellular fluid in order to make it iso-osmotic relative to the intracellular fluid? Intracellular fluid: Number of water molecules = 60 • Number of Dextrose molecules = 7 • Number of Sucrose molecules = 3 ● Extracellular fluid: • Number of water molecules = 160 • Number of dextrose molecule = ???? • Number of Sucrose molecules = 0Fatty acids are the building blocks and precursors membrane lipids. You are studying the impacts of temperature change on the composition of cell membranes from the nematode worm C. elegans. C.elegans is usually grown át 20°C but can tolerate being grown at 13°C and 27°C. The structure of the four fatty acid tails of membrane lipids are shown in the table below. The membrane composition changes with respect to the three tested temperatures Condition Condition Condition A C Fatty Acids in the membranes of C. elegons cells CH 23% 35% 35% COOH CH, 27% 45% 30% COOH 18% COOH 5% 10% 32% 15% 25% COOH Using the data from the table, which condition is most likely representing growth conditions at 13°C ? O Condition B O Condition C O Condition A
