Consider two membranes, Membrane A and Membrane B Membrane A is more fluid compa
ID: 93619 • Letter: C
Question
Consider two membranes, Membrane A and Membrane B Membrane A is more fluid compared to membrane B. This may be because: A) Membrane A has longer phospholipid tails, thus lowering hydrophobic interactions to increase membrane fluidity. B) Membrane B has more cholesterol, thereby increasing membrane fluidity due to the increase of hydrophobic interactions. C) Membrane B has more unsaturated phospholipids, thus increasing the hydrophobic interactions between the tails and decreasing its fluidity. D) Membrane A has less integral proteins than Membrane B. (E) You would expect none of the above. Ions can travel directly from the cytoplasm of one plant cell to the cytoplasm of an adjacent cell through: A) desmosomes. B) plasmodesmata. C) gap junctions. D) intermediate filaments. E) tight junctions.Explanation / Answer
correct answer is A
because , membrane A has longer phospholipid tails, thus lowering the hydrophobic interaction to increase membrane fluidity.
EXPLAINATION
the membrane phospholipid contain fatty acids of varying length and saturation.
lipids with shorter chains are less stiff and less viscous( i.e fluidity is less) because they are more susceptible to change in the kinetic energy because they have smaller molecular size and less surface area to undergo stabilizing van der waals interaction with neighbouring hydrophobic chains.