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24 March, 00:52

Imagine a small synthetic vesicle made from pure phospholipids enclosing an interior lumen containing 1 mM glucose and 1 mM sodium chloride. If the vesicle is placed in pure water, which of the following happens faster?

A. Na + diffuses out.

B. Cl - diffuses out.

C. H2O diffuses in.

D. Glucose diffuses out.

E. Sodium chloride diffuses out.

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  1. 24 March, 04:11
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    C. H2O diffuses in.

    Explanation:

    The phospholipids-made synthetic vesicle in this case will act like a semi-permeable membrane while the solution in the interior lumen will be hypertonic to the surrounding pure water.

    Hence, water molecules will diffuse into the lumen through the semi-permeable membrane because of the osmotic gradient that exist between the internal and the surrounding solution of the vesicle.
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