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STD 11 - 8. Cell the unit of life — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 8. Cell the unit of life4 Marks
MCQ
Assertion : Centrosomes and centrioles are related to each other.

Reason : Centrosome usually contains two cylindrical structures called centrioles

  • ✓
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • B
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • C
    If the Assertion is correct but Reason is incorrect.
  • D
    If both the Assertion and Reason are incorrect.
✓

Answer

Correct option: A.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
a
The centrosome is the main place where cell microtubules get organized. Centrosome usually contains two cylindrical structure called centrioles. Centrioles are composed of grouping of microtubules arranged in $9 + 3$ pattern. The pattern is so named because a ring of $9$ microtubule "triplets" are arranged at right angles to one another. Centrioles, found in animal cells, help to organize the assembly of microtubules during cell division. Centrioles replicate during the interphase stage of mitosis and meiosis

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