Question

Which of the following structures of the cell is non-living?
A. Cell membranes
B. Cell wall
C. Mitochondria
D. Chloroplast

Answer 1

Non-living structure in the cell is the cell wall. It is the outermost barrier of the cell, that is present just around the plasma membrane. The cell wall protects the entire cell from any kind of mechanical injury or abrasion.

Complete answer:
The cell wall is present in the plant cell and absent in the animal cell, this cell wall is made up of a macromolecule called cellulose that is a form of carbohydrates with cross-links, it provides structural support to the cell.
A. Cell membrane:- It is also known as plasma membrane that is present in both plants (just beneath the cell wall) and animal cell (the outermost covering), the cell membrane or plasma membrane is made up of bilayer phospholipid structure. Which is semipermeable, it regulates the transport of material.
C. Mitochondria:- It is the subcellular organelle present in the cell cytoplasm which acts as the powerhouse of the cell that means it generates ATP in the cell that utilizes it in various activities. Mitochondria is the cell, which possesses its DNA material which is utilized to replicate its number in the cells.
D. Chloroplast:- It is also a subcellular organelle found in the cells of the plant, this subcellular organelle is responsible for the photosynthesis process in the plant it possesses chlorophyll which provides green pigment of the cell. This organelle is only found in plants or photosynthetic organisms. This cell also has its genetic material which is utilized to increase its number.
Hence, the correct option is B.

Note: Cellulose is the complex organic macromolecule, which is made up of carbon, oxygen, and hydrogen, that found single unit called glucose and its polymerization from cellulose structure, that helps the plant to remain stiff, cellulose can not digest by humans but it acts as dietary fiber.