At the beginning of nuclear division, the number of microtubule triplets in two pairs of centrioles that migrate to opposite poles are:
Correct answer: D. 36
- A. 9
- B. 18
- C. 108
- D. 36
Explanation
Structure of a Centriole:Each centriole is composed of 9 microtubule triplets arranged in a cylindrical structure, forming the 9+0 arrangement.Centrioles in the Centrosome:Each centrosome contains a pair of centrioles (two centrioles).Since the cell contains two centrosomes during nuclear division (one for each pole), there are a total of 4 centrioles.Number of Microtubule Triplets:Each centriole has 9 triplets, so the total number of triplets in 4 centrioles is: 36
Last updated
About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
Practise Cell Structure and Function
2,478 free Cell Structure and Function MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
60S and 40S subunit combine to form ________ particle.
A cell fails to detoxity the waste substances produced in it because it does not possess enough:
A researcher wants to know the effect of magnesium ions on the function of cell organelles. He/ She grows some eukaryotic cells in a medium which lacks magnesium ions.Which of the following functions will be interrupted in these cells?
All are the functions of lysosome EXCEPT:
All of the following statements are true about lysosomes except: