A plant cell with a solute potential (Ψs) of –1.4 MPa and a pressure potential (Ψp)...
A plant cell with a solute potential (Ψs) of –1.4 MPa and a pressure potential (Ψp) of 0.7 MPa is placed in a solution with a solute potential of –0.5 MPa. At equilibrium what will be the: A) Water potential (Ψw) of the cell? B) Its solute potential? C) Increase or decrease in the pressure potential? Show your work, do not apply the 15% cell expansion ‘fudge factor.
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A plant cell with a solute potential (Ψs) of –1.4 MPa and a
pressure potential (Ψp)...
Plant water relations overview We use the term water potential (Ψw) to describe the chemical potential...
Plant water relations overview We use the term water potential (Ψw) to describe the chemical potential of water, and our understanding of diffusion of water depends on our understanding of how various factors (such as temperature, pressure, presence of dissolved solutes) affect the water potential in various parts of a system. Since diffusion of a substance tends to occur downward along a chemical potential or free energy gradient, it also is important to understand how such gradients are established. By...
a. A plant cell was placed into water that have Ys = 0 MPa. The plant...
a. A plant cell was placed into water that have Ys = 0 MPa. The plant cell’s Ys = -0.8 MPa and Yp = +0.6 MPa. Discuss where water will move and how the cell’s Ys and Yp will change with the movement of water. At equilibrium, what would happen if you add salt to the water? Explain. b. How does water move from roots to shoots? Discuss the three mechanisms.
UESTION 1 What would enhance water uptake by a plant cell? O decreasing the Ψ of...
UESTION 1 What would enhance water uptake by a plant cell? O decreasing the Ψ of the surrounding solution O increasing the pressure exerted by the cell wall ( the loss of solutes from the cell o increasing the Ψ of the cytoplasm O positive pressure on the surrounding solution QUESTION 2 The value for Ψ in root tissue was found to be- O be from the tissue into the sucrose solution O be from the sucrose solution into the...
Ovided before 4:30 PM. Late work will not be accepted. 1. A plant cell was placed...
Ovided before 4:30 PM. Late work will not be accepted. 1. A plant cell was placed into water that have Ys = 0 MPa. The plant cell's 's = -0.8 MPa and Up = +0.6 MPa. Discuss where water will move and how the cell's Ys and Yp will change with the movement of water. At equilibrium, what would happen if you add salt to the water? Explain.
Plant physiology questions To be completed and turned in next week: POST-LAB QUESTIONS: 1. If a...
Plant physiology questions
To be completed and turned in next week: POST-LAB QUESTIONS: 1. If a potato core is allowed to dehydrate by sitting in the open air, would the water potential of the potato cells decrease or increase? Why? 2. If a plant cell has a lower water potential than its surrounding environment and if pressure is equal to zero, is the cell hypertonic (Gn terms of solute concentration) or hypotonic to its environment? Will the cell gain or...
Superheated steam at 20 MPa, 560oC enters the turbine of a vapor power plant. The pressure...
Superheated steam at 20 MPa, 560oC enters the turbine of a vapor power plant. The pressure at the exit of the turbine is 0.7 bar, and liquid leaves the condenser at 0.4 bar at 75oC. The pressure is increased to 20.1 MPa across the pump and the specific enthalpy is 338.14 kJ/kg. The turbine isentropic efficiency is 81%. Cooling water enters the condenser at 20oC with a mass flow rate of 70.7 kg/s and exits the condenser at 38oC. For...
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Consider...
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Consider the following plant cells floating in an open beaker containing 0.2M sucrose. By definition, an open beaker has a pressure potential O MPa. Assume that the cells have come to equilibrium with the solution in the beaker. Beaker Cell 1 Cell 2 Cell 3 Component Solute potential -0.5 MPa 1 -1.0 MPa 1 -0.75 MPa -0.5 MPa Pressure potential Yp 0.0 MPa Total water...
The monovalent salt concentration (the predominant solute in the blood cell) for a sample of red...
The monovalent salt concentration (the predominant solute in the blood cell) for a sample of red blood cells is 0.19 moles/liter. If one of these red blood cells were placed in pure water (at around room temperature, 300 K), and the cell comes to hydrostatic equilibrium with the water, what is the osmotic pressure of the cell (assuming it doesn't burst)? Provide your answer in kilopascals (1 kPa = 1x103 Pa). Again, be careful, salts dissociate when dissolved, and take care...
1. The solubility of a gaseous solute in water is by an increase in pressure. Increased...
1. The solubility of a gaseous solute in water is by an increase in pressure. Increased decreased not affected 2. A supersaturated solution may be prepared by slowly cooling down a solution saturated at an elevated temperature. TRUE FALSE 3. A dilution is a solution made by adding a solvent to a supersaturated solution. TRUE FALSE 4. When sugar & water are mixed, a clear liquid results. In this scenario, the sugar is considered a Solute Solution Solvent All of...
Q. If you place a plant in a box with a source of red light coming...
Q. If you place a plant in a box with a source of red light coming in from the left hand side: The plant shoot will bend to the right The plant shoot will bend to the left The plant shoot will not bend The direction of bending will depend on stem water potential Q. Which of the following processes is not directly involved in auxin-mediated cell expansion? Acidification of cell walls Production of cellulose microfibrils Cellular nitrate (NO3-) accumulation...
UESTION 1 What would enhance water uptake by a plant cell? O decreasing the Ψ of the surrounding solution O increasing the pressure exerted by the cell wall ( the loss of solutes from the cell o increasing the Ψ of the cytoplasm O positive pressure on the surrounding solution QUESTION 2 The value for Ψ in root tissue was found to be- O be from the tissue into the sucrose solution O be from the sucrose solution into the...
Ovided before 4:30 PM. Late work will not be accepted. 1. A plant cell was placed into water that have Ys = 0 MPa. The plant cell's 's = -0.8 MPa and Up = +0.6 MPa. Discuss where water will move and how the cell's Ys and Yp will change with the movement of water. At equilibrium, what would happen if you add salt to the water? Explain.
Plant physiology questions
To be completed and turned in next week: POST-LAB QUESTIONS: 1. If a potato core is allowed to dehydrate by sitting in the open air, would the water potential of the potato cells decrease or increase? Why? 2. If a plant cell has a lower water potential than its surrounding environment and if pressure is equal to zero, is the cell hypertonic (Gn terms of solute concentration) or hypotonic to its environment? Will the cell gain or...
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Consider the following plant cells floating in an open beaker containing 0.2M sucrose. By definition, an open beaker has a pressure potential O MPa. Assume that the cells have come to equilibrium with the solution in the beaker. Beaker Cell 1 Cell 2 Cell 3 Component Solute potential -0.5 MPa 1 -1.0 MPa 1 -0.75 MPa -0.5 MPa Pressure potential Yp 0.0 MPa Total water...
1. The solubility of a gaseous solute in water is by an increase in pressure. Increased decreased not affected 2. A supersaturated solution may be prepared by slowly cooling down a solution saturated at an elevated temperature. TRUE FALSE 3. A dilution is a solution made by adding a solvent to a supersaturated solution. TRUE FALSE 4. When sugar & water are mixed, a clear liquid results. In this scenario, the sugar is considered a Solute Solution Solvent All of...
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