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CBSE Class 9 Answered

please answer my some questions :
Asked by piyu1996 | 13 Apr, 2010, 22:52: PM
answered-by-expert Expert Answer

2) A microtubule is a hollow cylinder about 24 nm in diameter.Microtubules are polymers of α- and β-tubulin dimers. The tubulin dimers join end to end in protofilaments. The protofilaments then bundle into hollow cylindrical filaments. Typically, the protofilaments arrange themselves in an imperfect helix.

 

Kindly post each query separately.

Answered by | 16 Apr, 2010, 08:53: AM

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