A) chromomere
B) chromocentre
C) centriole
D) kinetochore
Correct Answer: D
Solution :
| [D] During late prophase, specialised structures called kinetochores develop on either surface of the centromere. Chromosomal fibres get attached to kmetochore. Chromomeres are beaded structures on the chromosomes which are found particularly at the prophase I (particularly at leptotene) of meiosis l. Chromocentre is developed due to the fusion of centromeric regions of all the chromosomes of a cell. Centrosome is found in animal cells (absent in plant cells). It is found near the nucleus. Each centrosome is made up of two centrioles and each centriole is a cylindrical structure with a diameter of 1500-1800 \[\overset{O}{\mathop{A}}\,\] and is made up of nine fibrils. The main function of centromereis at the time of cell division when the two centrioles separate and move to opposite poles. Aster and spindle are formed from it which help in the movement of chromatids. |
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