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NaCl is harmful to most crop plants. A scientist at the University of Toronto genetically modified a plant so that it could be grown in dry parts of the world where the available water has a high level of NaCl. This genetically modified plant copes with the high levels of NaCl by transporting salt into its vacuoles where it accumulated to abnormally high level. which feature would be observed in the genetically modified plant when compared to a non-modified plant ?A. The leaves in the modified plant are more yellow in colourB. The modified plant has salt srystals on the surface of its levesC. The cytosol (the materal between the plasma membrane and the vacuole membrane, excluding the organelles) in the modified plant has a lower osmotic pressureD. The cytosol in the modified plant has a higher osmotic pressure |
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Answer» Correct Answer - D Osmotic pressure is the pressure required to stop the flow of pure water or solvent into a solution across a partially permeable membrane. Water moves from a region of low osmotic pressure to a region of high osmotic pressure. As high levels of NaCl is accumulated in the cells of modified plant. the osmotic pressure of the cytosol is increased. Accumulation of salts in vacuoles causes compartmentalisation of salt away from cytosol and protects cytosol form harmful effects of the high salt concentration. |
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