Question

The deposition of one of the following in plant cells make them impervious to gases and water
A. Cellulose
B. Hemicellulose
C. Suberin
D. Pectin

Answer 1

The plant cell wall can have lignin for durability, silica for rigidity and safety, cutting for water loss prevention, wax for water repellant and cutting for insulative properties.

Complete Answer:
The nonliving portion is described as a cell wall that covers the outermost layer of a cell. Its structure varies and is absorbent in nature according to the organism. The internal contents of the cell are separated from the external atmosphere by the cell wall. It also gives the cell as well as its organelles with structure, support, and defense. However, in eukaryotic plants, fungi, and several prokaryotic species, this cellular aspect is present exclusively.

Now, let us find the solution from the options-
- The main cell wall in green plants, several species of oomycetes and algae are an essential structural part of cellulose. It is secreted by certain types of bacteria to form biofilms. The most common organic polymer on Earth is cellulose. Thus, option A is not the correct option.
- Hemicellulose is among a number of heteropolymers, like arabinoxylans, found in nearly all terrestrial plant cell walls, together with cellulose. Hemicelluloses get a spontaneous, amorphous phase with little structure, although cellulose is crystalline, solid, and hydrolysis tolerant. Dilute acid and a base, and a multitude of hemicellulase enzymes are readily hydrolyzed. Thus, option B is not the correct option.
- Suberin and cutin are strongly polymerized, non-melting fatty acids that are unsolvable in fat solvents and thus susceptible to gas and water. Cutin creates cuticles, and phellem suberin is primarily present in cork cells.
- Pectin is a complex collection of polysaccharides found in most plant cell walls and is especially abundant in the non-woody areas of terrestrial plants. Pectin is a key element of the cell membrane, but is also present in primary cell walls, where it serves to tie cells together. Through vesicles formed in the golgi, pectin is incorporated into the cell membrane by exocytosis. Thus, option D is not the correct option

Thus, the correct option is option (C) Suberin.

Note: Cell wall structure varies from species to species and can based on the location of cell and stage of growth. Polysaccharides, hemicellulose, celluloses and pectin are formed of the primary cell wall of land plants. Sometimes, other polymers are anchored to or incorporated in plant cell walls, like lignin, cutin or suberin.