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TLS Online TPP Program

#Id: 5893

base pairs at the 3’ end of the primer, which are in the more open A-form. A sharp turn in the DNA exposes the template base to the incoming nucleotide

#Unit 3. Fundamental Processes #Mechanism of DNA synthesis in Prokaryotes #Part B Pointers
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TLS Online TPP Program

#Id: 1514

#Unit 2. Cellular Organization

Most microtubules in a cell consist of a simple tube, a singlet microtubule, built from 13 protofilaments. 
TLS Online TPP Program

#Id: 1515

#Unit 2. Cellular Organization

Doublet contains one complete 13-protofilament microtubule (A tubule) and one additional tubules (B tubule) consisting of 10 protofilaments.
 
TLS Online TPP Program

#Id: 1516

#Unit 2. Cellular Organization

Triplet contains one complete 13-protofilament microtubule (A tubule) and two additional tubules (B & C tubule) consisting of 10 protofilaments each.
TLS Online TPP Program

#Id: 1517

#Unit 2. Cellular Organization

All microtubules are nucleated from structures known as microtubule-organizing centers, or MTOCs.

 
TLS Online TPP Program

#Id: 1518

#Unit 2. Cellular Organization

In MTOCs, 
The (−) end of the microtubule stays anchored in the MTOC while the (+) end extends away from it.
TLS Online TPP Program

#Id: 1519

#Unit 2. Cellular Organization

In cilia and flagella,
microtubules are assembled from an MTOC called a basal body.