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frosja888 [35]
4 years ago
10

Microtubules are typically _______ in diameter.

Biology
1 answer:
jeyben [28]4 years ago
4 0

Answer:

25nm

Explanation:

Microtubules are polymers of tubulin and they are part of the cytoskeleton. The roles of the microtubules are to maintain the shape and structure of the cell, intracellular transport, they are structural part of the cilia an flagella, they are involved in cell division etc.

Tubulin that is the basic unit of microtubules is composed of two globular proteins, alpha and beta tubulin. Alpha and beta subunits sponta­neously form dimers which then assemble into oligomers, then in chains (protofilaments); that can form a variety of intermediate structures such as single and double rings or spirals. Protofilaments that associate side-by-side  form sheets of protofilaments which then curle to form a tube or cylinder (closing of microtubule). Continued growth of microtubules occurs by the di­rect addition of more dimers on + side.

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During which phase of meiosis do the homologous chromosomes separate and head towards opposite poles of the cell?
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During anaphase, homologous chromosomes separate and head towards opposite poles of the cell.

  • A cell prepares for cell division by replicating its chromosomes, segregating them, and creating two identical nuclei during the mitotic phase.
  • After the metaphase procedure, the mitotic stage known as anaphase occurs during which the freshly replicated chromosomes are transferred to the opposing poles of the cell and the replicated chromosomes are split.
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learn more about anaphase here:

brainly.com/question/26912274

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Explanation:

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