Question

The rigidity of plant cell wall is created by
(a) Cell membrane
(b) Plasma
(c) Tensile strength
(d) Hydraulic turgor pressure

Answer 1

2 millions of RBCs are produced per second. Fewer WBCs are produced as compared to RBCs.

Complete answer: To solve this question, first we should know about plant’ cell wall. The existence of a cell wall is characteristic of the plant cells. The relative rigidity of the cell wall makes plants sedentary, unlike animals whose lack of this kind of structure provides more stability for their cells, which is important for locomotion. The cell wall of the plant performs a number of purposes.

Additional information: Now lets us find the solution from the given options-
Plant cells are somewhat peculiar, since they contain either a cell wall or a cell membrane, unlike animal cells. The cell membrane is a semi-permeable cover which surrounds the cells outside. Plant cell membranes are located outside of the cytoplasm of the cell and only within the nucleus of the cell. So, cell membrane is an incorrect answer. Thus, option A is an incorrect option.

Plasma occupies the blood's liquid part. It contains essential proteins responsible for vital functions including making your blood clot and protecting the body from infections. So, Plasma cell is an incorrect answer. Thus, option B is an incorrect option.
A plant cell's aqueous extracellular layer is composed of the fluid found within the walls of the cell. While the fluid in the plant cell wall includes more solutes than the water in the exterior atmosphere of the plant, it is nevertheless hypotonic as applied to the interior of the cell. This osmotic instability allows the cell to create a strong internal hydrostatic pressure, or turgor pressure, which forces the cell wall outwards much like an internal tube forces a tire outward. So, tensile strength is an incorrect answer.
Thus, option C is an incorrect option.

The cell wall is fluid in most cells, which means it bends rather than maintains a fixed form, but has significant tensile resistance. Cell wall compensates for the obvious rigidity of primary plant tissues but is not due to the rigidity of the cells. This rigidity, along with the wall strength, is created by hydraulic turgor pressure. So, hydraulic pressure is the correct answer.

Thus, the option D is the correct answer. i.e. hydraulic pressure

Note: The hydraulic turgor pressure is critical for plants, as it is the key driving force for cell expansion during development by providing much of the structural rigidity of living plant tissues