Which of the following is true regarding membrane asymmetry? Carbohydrates attached to membrane lipids are usually found on the cytosolic side of the membrane. A flippase causes lateral diffusion to occur very rapidly. Lateral diffusion occurs very slowly. Transverse diffusion occurs very quickly. Phosphatidylserine occurs predominantly on the inner leaflet of membrane bilayer.

Question

15-04-2020
Biology

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Which of the following is true regarding membrane asymmetry? Carbohydrates attached to membrane lipids are usually found on the cytosolic side of the membrane. A flippase causes lateral diffusion to occur very rapidly. Lateral diffusion occurs very slowly. Transverse diffusion occurs very quickly. Phosphatidylserine occurs predominantly on the inner leaflet of membrane bilayer.

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podgorica podgorica · Answer 1 · 2020-04-17T07:54:49+02:00

Answer:

Option E, Phosphatidylserine occurs predominantly on the inner leaflet of membrane bilayer.

Explanation:

Membrane asymmetry is basically the difference between two layer of the bilayer in terms of physical properties and composition.

This membrane lipid asymmetry is important for signal transduction and cell homeostasis.

Outer monolayer consists of phospholipids with choline and polar heads such as phosphatidylcholine while the inner layer has terminal primary amino group known as phospatidylserine. Cholesterol is distributed throughout the two monolayers.

Hence, option E is correct