Question

Which of the following is NOT true of phospholipid bilayers?

A. The interior of phospholipid bilayers is a highly hydrophobic environment.
B. Membrane budding requires transient breakages in the bilayer membrane.
C. Phospholipid bilayers separate the cell from the exterior environment as well as from compartments within the cell.
D. The chemical properties of phospholipids lead to the spontaneous formation of bilayers.

Answer 1

The statement that membrane budding requires transient breakages in the phospholipid bilayer membrane is NOT true; the membrane can bud and form vesicles without breaking.

Step-by-step explanation:

The question relates to the properties of phospholipid bilayers and their role in cell membrane structure. Analyzing the statements provided, it is important to understand that phospholipids consist of hydrophilic (water-loving) heads that face the aqueous environments inside and outside of the cell, and hydrophobic (water-fearing) tails that face each other in the interior of the bilayer.

Option B, which states that membrane budding requires transient breakages in the bilayer membrane, is NOT true of phospholipid bilayers. Membrane budding, a process where vesicles are formed from membranes, involves the membrane curving inward and eventually pinching off to form a vesicle, rather than breaking. This dynamic process allows the membrane to change shape without losing its integrity.

Therefore, the correct answer to the question 'Which of the following is NOT true of phospholipid bilayers?' is B. Membrane budding requires transient breakages in the bilayer membrane.

Answer 2

The correct answer is option B. membrane budding requires transient breakages in the bilayer membrane.

Explanation:

Phospholipid bilayer consists of two layers of the phospholipids with a hydrophilic head externally and hydrophobic tail internally in each phospholipid molecule. It is the surrounding membrane that encloses the cell cytoplasm and contents.

Internally phospholipid bilayer are hydrophobic due to hydrophobic in nature. It acts as a barrier that separates the cell from the external environment. It is possible to spontaneous formation of bilayers is due to to the chemical properties.

Thus, the correct answer is option B.