Question

Microtubule is involved in the

• A. muscle contraction
• B. membrane architecture
• C. cell division
• D. DNA recognition.

Answer 1

The Correct Option is C

The question pertains to the biological structure and function of microtubules, which are integral components of the cell cytoskeleton. The correct answer, as stated, is "cell division." Let's explore why this is the correct choice and rule out other options:

Understanding Microtubules:

Microtubules are cylindrical structures composed of tubulin protein dimers. They are dynamic in nature, capable of growing and shrinking by adding or removing tubulin dimers at their ends. Their primary functions in the cell include providing structural support, transportation within the cell, and facilitating cell division, particularly mitosis and meiosis.

Role of Microtubules in Cell Division:

During cell division, microtubules play a crucial role in forming the mitotic spindle, a structure responsible for separating chromosomes into two daughter cells. The spindle microtubules attach to chromosomes at specialized structures called kinetochores, ensuring precise distribution of genetic material.

Ruling Out Other Options:

• Muscle Contraction: This process primarily involves actin filaments and myosin motors, not microtubules. Actin and myosin interactions are responsible for the contraction and relaxation of muscle fibers.
• Membrane Architecture: Microtubules do not directly participate in the structure of cellular membranes. Membranes are primarily made up of lipid bilayers and transmembrane proteins.
• DNA Recognition: DNA recognition involves specific protein-DNA interactions, such as those mediated by transcription factors, rather than microtubules.

In conclusion, the involvement of microtubules in the formation and function of the mitotic spindle makes them vital for cell division. This aligns with the correct answer: "cell division."

Tip: Remembering the role of key cytoskeletal elements can aid in answering biology questions effectively. Microtubules are associated with shape and transport, actin with movement, and intermediate filaments with support.