Question

Select the odd one out:

• A. The movement of water across a semi-permeable membrane is affected by the amount of substances dissolved in it.
• B. Membranes are made of organic molecules like proteins and lipids.
• C. Molecules soluble in organic solvents can easily pass through the membrane.
• D. Plasma membranes contain chitin sugar in plants.

Answer 1

The correct option is D

Plasma membranes contain chitin sugar in plants.

The correct option is D.
Explanation of the correct option:

1. The plasma membrane, a remarkably delicate, thin, and elastic living membrane that surrounds each cell, is this boundary.
2. The two layers of lipid (fat) molecules that make up the plasma membrane are sandwiched together by protein molecules.
3. Only an electron microscope may be used to view the structure of the plasma membrane.
4. It is a selectively permeable membrane, permitting only a limited number of chemicals to enter and leave the cell.
5. The primary element of a fungus' cell wall is chitin.
6. Lipids and proteins make up the plasma membrane.
7. There are no membranes on viruses.

Explanation of the incorrect options:
Option A:

1. The amount of compounds dissolved in a semi-permeable membrane has an impact on the flow of water through it.
2. The fluid mosaic model explains the plasma membrane's structure.

Option B:

1. The plasma membrane is made up of lipids and proteins, just like every other cellular membrane.
2. The phospholipid bilayer, which creates a permanent barrier between two aqueous compartments, is the membrane's basic structural component.

Option C:

1. Because the membrane is lipophilic, molecules soluble in organic solvents can easily travel through it.
2. Lipophilic permeability inside the membrane is altered by steric variables as well as by the creation of hydrogen bonds with membrane constituents.
3. These findings suggest that polar moieties are in contact with lipid-soluble molecules as they pass through an ordered structure within the lipid membrane.

Final answer: Plasma membranes containing chitin sugar in plants is the odd one out.