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Cytoskeleton

Peripheral mi...

Question

Peripheral microtubules in flagella are connected to each other through

A

Radial spoke

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B

Central sheath

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C

Interdoulet bridges

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D

Plasma membrane

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Solution

The correct option is A Radial spoke

This arrangement is called 9+2 or 11- stranded. However, 9+1 and 9+0 arrangements have also been observed. The two central singlet fibers are covered by a proteinaceous central sheath. they are connected by a double bridge.
So the correct option is 'Radial spoke'.

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Similar questions

Q. Read the following statements:
(i) Cilia and flagella work like oars
(ii) Cilia are relatively longer than flagella
(iii) Prokaryotic and eukaryotic flagella are structurally similar
(iv) Cilia and flagella are covered with plasma membrane in eukaryotes
(v) The core of cilia/flagella is called axoneme which has nine pairs of doublets or radially arranged peripheral microtubules and a pair of centrally located microtubules.
How many of the given statements are correct?

Q. Centrioles differ from cilia or flagella in
(a) the number of microtubules in each peripheral group
(b) the number of radial spokes
(c) the arrangement of microtubules
(d) containing proteinaceous central hub
(e) being surrounded by double membrane
Choose the correct set of options.

Q. Assertion :The arrangement of axonemal microtubules in cilia or flagella is called

9 + 2

array. Reason: The axoneme usually has nine pairs or doublets of radially arranged peripheral microtubules, and a pair of centrally located microtubules.

Q. Read the following statements and state true (T) or false (F) regarding cilia and flagella of eukaryotic cells.
The axoneme usually has nine pairs of triplets of radially arranged peripheral microtubules.

Q. Electron microscopic study of cilium and flagellum revealed that they are covered with the plasma membrane and the core structure is called "axoneme", possesses a number of microtubules running parallel to the axis. How many numbers of microtubule arrays are arranged peripherally and centrally

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