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NEET UG BIOLOGY MCQ: CELL-THE UNIT OF LIFE
1
Hard
1 of 1
Understanding
+4 | -1
Assertion (A): Polar molecules can not pass through non polar lipid bilayer.
Reason (R): Polar molecules require a carrier protein of the membrane to facilitate their transport across the membrane.
Reason (R): Polar molecules require a carrier protein of the membrane to facilitate their transport across the membrane.
View answer and explanation
Correct option: B
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
Option B is correct. Both the assertion and the reason are true, but the reason does not correctly explain the assertion. Polar molecules cannot easily pass through the nonpolar lipid bilayer, and they often require carrier proteins for transport, but the need for carrier proteins is not the direct reason they can't pass through the bilayer.
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