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Cell Cycle and Cell Division

Multiple Choice Questions

41.

Mitotic spindle have main protein

tubulin
myosin
tropomyosin
dynein

42.

Crossing over occurs in

zygotene
leptotene
pachytene
diplotene

43.

Number of chromosomes in an angiospermic plant is 14, then the number of chromosomes in synergid cells will be

44.

At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?

During entire prophase
During telophase
During S-phase
During G₂ stage of prophase

45.
In meiosis division is

Ist reductional and IInd equational

Ist equational and IInd reductional

both reductional

both equational

Ist reductional and IInd equational

The term 'Meiosis' was given by Farmer and Moore (1905). To study meiosis in plants, anther is the best part.

The process of meiosis involves two division of the genetic material. The first division is called reduction division or Meiosis I as it reduces the number of chromosomes from 46 chromosomes or 2n to 23 chromosomes or n.

Meiosis II is called equational division because it does not reduce chromosome numbers. A nuclear division that maintains the same ploidy level of the cell.