Question

How many radial spokes are seen in the axoneme cilium or the flagellum?

Answer 1

Axoneme:

1. Eukaryotic flagella and cilia have a 9+2 structural arrangement in common.
2. An axoneme is a name given to its core.
3. The axoneme is made up of nine pairs of microtubule doublets arranged in a ring around a central pair of singlet microtubules.
4. The axoneme is made up of bundles of microtubules that are surrounded by a plasma membrane.

Radial spokes:

1. Each doublet microtubule is made up of A and B protofilament tubules.
2. They are linked by a protein known as 'tektin.'
3. A linker made of a protein called nexin connects adjacent pairs of doublet microtubules.
4. From the central singlets, a second linker radiates to each A tubule of the peripheral microtubules.
5. Radial spokes are the name given to these linkers.