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Cell Membrane

A cell membra...

Question

A cell membrane contains 60% proteins (density 1.33) and 40% phospholipids (density 0.92). When the membrane is centrifuged in NaCl solution (density 0.92), it will:

A

float

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B

form a sediment

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C

form a layer in the centre of the NaCl column

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D

fragment in the NaCl column

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Solution

The correct option is B
form a sediment

Protein is heavier, therefore the membrane will form a sediment.

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