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Question
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.
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.
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Solution
The correct option is A a, c and d
Like cilia and flagella, centrioles are also made of microtubules.
A centriole possesses a whorl of nine peripheral fibrils. Fibrils are absent in the centre. The arrangement is, therefore, called 9+0.
Flagellum contains an axoneme of a peripheral doublet fibrils and 2 central singlet fibrils. This arrangement is called 9+2 or 11 stranded.
The centre of the centriole possesses a rod-shaped proteinaceous mass known as hub. The hub has a diameter of 2.5 nm. From the hub, develops 9 proteinaceous strands towards the peripheral triplet fibrils called radial fibres or spokes.
Like cilia and flagella, centrioles are also made of microtubules.
A centriole possesses a whorl of nine peripheral fibrils. Fibrils are absent in the centre. The arrangement is, therefore, called 9+0.
Flagellum contains an axoneme of a peripheral doublet fibrils and 2 central singlet fibrils. This arrangement is called 9+2 or 11 stranded.
The centre of the centriole possesses a rod-shaped proteinaceous mass known as hub. The hub has a diameter of 2.5 nm. From the hub, develops 9 proteinaceous strands towards the peripheral triplet fibrils called radial fibres or spokes.
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