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Which of the following is a correct statement about polar substances?ANSWERFats and vitamins like A and D are considered polar molecules.The plasma membrane is said to be a polar structure.Polar molecules form micelles when exposed to an aqueous environment.Polar, or hydrophilic, substances readily dissolve in water.

Question

Which of the following is a correct statement about polar substances?ANSWERFats and vitamins like A and D are considered polar molecules.The plasma membrane is said to be a polar structure.Polar molecules form micelles when exposed to an aqueous environment.Polar, or hydrophilic, substances readily dissolve in water.

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Solution

The correct statement about polar substances is: "Polar, or hydrophilic, substances readily dissolve in water."

Here's why:

  1. Fats and vitamins like A and D are not considered polar molecules. They are nonpolar and hydrophobic, meaning they do not readily mix with water.

  2. The plasma membrane is not entirely polar. It is a phospholipid bilayer, which means it has both polar (hydrophilic) and nonpolar (hydrophobic) parts. The polar heads face the aqueous environment, while the nonpolar tails face each other.

  3. Polar molecules do not form micelles when exposed to an aqueous environment. It's the nonpolar, or hydrophobic, substances that tend to form micelles in water to minimize contact with the water.

  4. Polar, or hydrophilic, substances readily dissolve in water. This is because water is a polar solvent, and "like dissolves like." That is, polar solutes tend to dissolve in polar solvents, and nonpolar solutes in nonpolar solvents.

This problem has been solved

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