Microtubules provide rigidity and tensile strength to cells.

Question

BlackTom AI · Accepted Answer

The question asks us to evaluate the statement: "Microtubules provide rigidity and tensile strength to cells."

Option 1: True. This option claims that microtubules supply both rigidity and tensile strength. While microtubules do contribute to cell shape and mechanical stiffness by forming a rigid scaffold, their primary role is to resist compressive forces and organize the cytoskeleton, not to provide the major tensile strength. Tensile strength in cells is predominantly supplied by intermediate filaments, which are specifically adapted to bear mechanical stretch and tension. So, claiming that microtubules provide the main tensile strength is an oversimplification and partially inaccurate.

Option 2: False. This option asserts that the statement is incorrect. A more precise understanding is that microtubules contribute to rigidity and help maintain cell shape and polarity, but they are not the main source of tensile strength—that role belongs to intermediate filaments. Moreover, microtubules are dynamic polymers that undergo frequent growth and shrinkage, which is not characteristic of a structure primarily supplying tensile strength.

In summary, the claim overstates the role of microtubules by attributing them with the major tensile strength of the cell, which is not their primary function. The distinction between rigidity against compression (microtubules) and tensile resistance (intermediate filaments) is important for a nuanced understanding of cytoskeletal mechanics.

AVBS2005 (ND) Cytology

Microtubules provide rigidity and tensile strength to cells.

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