OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which statement about water is correct?
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The atoms within a molecule of water are held together by hydrogen bonds.
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Water has a low heat capacity allowing enzymatic reactions to happen at a wide range of temperatures.
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Water molecules are polar, therefore fatty acids do not dissolve.
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Ice has a higher density than liquid water, therefore some organisms can live under the ice.
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Explanation:
Detailed explanation-1: -Lipids are not polar molecules, and they are not soluble in water.
Detailed explanation-2: -Water interacts differently with charged and polar substances than with nonpolar substances because of the polarity of its own molecules. Water molecules are polar, with partial positive charges on the hydrogens, a partial negative charge on the oxygen, and a bent overall structure.
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