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3 September, 15:34

Which statement must be mentioned in explaining why amphipathic molecules line up at a water surface? Which statement must be mentioned in explaining why amphipathic molecules line up at a water surface?

A. Nonpolar groups repel water.

B. Nonpolar groups attract one another.

C. Polar groups attract one another.

D. Polar groups repel water.

E. All of the above.

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  1. 3 September, 15:38
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    Answer: Option (C) is the correct answer.

    Explanation:

    An amphipathic molecules is defined as the molecule that contains both polar and non-polar parts.

    For example, phospholipids are amphipathic molecules as they contain non-polar fatty acids known as tails and polar phosphate known as heads.

    In amphipathic molecules, the polar water molecules tend to pull towards each other. As a result, non-polar parts tend to move away into the air.

    Therefore, we can conclude that amphipathic molecules line up at a water surface because polar groups attract one another.
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