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NTA Abhyas NEET2020BotanyCell - The Unit of LifePractice

Select the incorrect pairing.

Options

  1. AMitochondria—Semiautonomous organelle
  2. BStroma—Site of dark reaction
  3. CCentrioles—(9 + 2) array of microtubules
  4. DAxoneme —Core of eukaryotic flagella

Correct answer

C. Centrioles—(9 + 2) array of microtubules

Step-by-step solution

Structure of a centriole. (i) A centriole possesses a whorl of nine evenly spaced peripheral fibrils of tubulin. It is absent in the center. Therefore, the arrangement is called a 9+0. (ii) Each fibril is made up of three sub-fibres. Therefore, it is called triplet fibril named A, B, C. (iii) The adjacent triplet fibrils are inter-connected by C-A proteinaceous linkers. (iv) The centre of the centriole possesses a rod-shaped proteinaceous mass known as a hub. From the hub, nine proteinaceous strands are developed t

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