OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sodium chloride is transported as Na+ and Cl-in blood.
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Movement of water occurs under tension in the xylem.
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Water is the coolant in sweat.
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Ice floats on liquid water.
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Detailed explanation-1: -Sodium chloride: Polar, and so it is soluble in water. It is transported dissolved in the plasma.
Detailed explanation-2: -Water serves to suspend the red blood cells to carry oxygen to the cells. It is the solvent for the electrolytes and nutrients needed by the cells, and also the solvent to carry waste material away from the cells. With water as the solvent, osmotic pressure acts to transport the needed water into cells.
Detailed explanation-3: -Transport of Substances in the Blood The solvent properties of water mean that many different substances can dissolve in it because of its polarity. This allows substances to be carried in the blood and sap of plants as they dissolve in water. It also makes water a good medium for metabolic reactions.