Why do you think it is a good idea to soak wilted lettuce in cool water before serving it?
The water is an isotonic solution relative to the cytoplasm in the plant cells, so they will gain water and the lettuce will become less wilted.
The water is a hypertonic solution relative to the cytoplasm in the plant cells, so the plant cells will lose water and the lettuce will become crisper.
Soaking the lettuce in water would have no effect.
The water is a hypotonic solution relative to the cytoplasm in the plant cells, so the plant cells will gain water and the lettuce will become crisper.
The Correct Answer is D
Choice A rationale: An isotonic solution has the same solute concentration as the plant cells, which means it has the same water potential. Water will move in and out of the plant cells at the same rate, causing them to remain unchanged in size and shape. This will not help the lettuce to become less wilted.
Choice B rationale: A hypertonic solution has a higher solute concentration than the plant cells, which means it has a lower water potential. Water will move out of the plant cells by osmosis, causing them to shrink and become plasmolysed. This will make the lettuce more wilted and not crisper.
Choice C rationale: Soaking the lettuce in water would have an effect, depending on the relative solute concentration of the water and the plant cells. Water will move across the cell membrane by osmosis, either into or out of the plant cells, causing them to change in size and shape.
Choice D rationale: A hypotonic solution has a lower solute concentration than the plant cells, which means it has a higher water potential. Water will move into the plant cells by osmosis, causing them to swell and become turgid. This will make the lettuce crisper and more appealing.
Choice E rationale: A hypotonic solution will cause the plant cells to gain water and become turgid, not more wilted. Wilted lettuce is caused by the loss of water from the plant cells, which makes them flaccid and soft.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale: Locates the specimen is incorrect because the fine adjustment knob does not help to find the specimen on the slide, but rather to adjust the focus of the specimen. The fine adjustment knob is a small knob that is located on the side of the microscope, next to the coarse adjustment knob. The fine adjustment knob is used to make small changes in the distance between the objective lens and the specimen, which improves the sharpness of the image.
Choice B rationale: All of the answer choices are correct is incorrect because only one of the answer choices is correct. The fine adjustment knob only fine-tunes the focus of the specimen, not locates the specimen or the focus plane.
Choice C rationale: Locates the focus plane is incorrect because the fine adjustment knob does not help to find the focus plane, but rather to adjust the focus of the specimen. The focus plane is the plane that is perpendicular to the optical axis of the microscope and passes through the focal point of the objective lens. The focus plane is where the specimen is in focus and the image is clear.
Choice D rationale: Fine-tunes the focus is correct because the fine adjustment knob is used to fine-tune the focus of the specimen, which means to make small adjustments in the focus to obtain the best image quality. The fine adjustment knob is used after the coarse adjustment knob, which is used to bring the specimen into approximate focus.
Correct Answer is {"dropdown-group-1":"C"}
Explanation
Choice A rationale: Osmotic is incorrect because osmotic is an adjective that describes the movement of water across a semipermeable membrane, not a type of solution. Osmosis is the process by which water moves from a region of high water concentration to a region of low water concentration.
Choice B rationale: Isotonic is incorrect because isotonic is a type of solution that has the same concentration of water as the cell placed in the solution. In an isotonic solution, there is no net movement of water across the cell membrane.
Choice C rationale: Hypertonic is correct because hypertonic is a type of solution that has a lower concentration of water than the cell placed in the solution. In a hypertonic solution, water moves out of the cell and into the solution by osmosis, causing the cell to shrink.
Choice D rationale: Diffusive is incorrect because diffusive is an adjective that describes the movement of molecules from a region of high concentration to a region of low concentration, not a type of solution. Diffusion is the process by which molecules move across a membrane or a space due to their random motion.
Choice E rationale: Hypotonic is incorrect because hypotonic is a type of solution that has a higher concentration of water than the cell placed in the solution. In a hypotonic solution, water moves into the cell and out of the solution by osmosis, causing the cell to swell.
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