Question Detail
Question
Which of the following is not correct about cilia and flagella? a. They are both organelles for motility b. Cilia beats like pedals while flagella brings about whip-like movement c. Both are composed of contractile protein called microtubules d. Cilia is longer than flagella e. None of the above
Correct Answer
Option D is the correct answer.
Detailed Explanation
The statement that 'cilia is longer than flagella' is incorrect. Typically, flagella are longer (up to 150 µm) and fewer in number per cell, while cilia are shorter (5-10 µm) and more numerous. The other statements are correct: both are motile organelles composed of microtubules in a '9+2' arrangement, and they have different beating patterns.
Hint
Compare their names: 'flagella' sound like long whips, while 'cilia' sound like short little hairs.