Question

Select the odd one out?

• A. The movement of water across a semi-permeable membrane is affected by the number 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 correct option:

1. Cell walls of a cell membrane contain chitin sugars and not the plasma membrane.
2. Chitin is a linear polysaccharide that is present in amino sugars.
3. It is present in sponges, nematodes, and fungi.

Explanation of incorrect options:

Option A:

1. The movement of water across a semi-permeable membrane is affected by the amount of substance dissolved in it.
2. As water moves from higher concentration to lower concentration.

Option B:

1. Membranes are mainly formed by proteins and lipids.
2. The concentration of protein and lipids are different in various types of cells.
3. The concentration is not the same in all the cells.

Option C:

Molecules dissolve in organic solvents and easily pass from the membrane as the membrane is dissolved in lipids and fats present in cells.

Final answer: The odd one out is plasma membranes containing chitin sugar in plants.