Multiple Choice QuestionsMitotic spindle have main protein
tubulin
myosin
tropomyosin
dynein
A.
tubulin
The mitotic spindle is a highly dynamic molecular machine composed of tubulin, motors and other molecules. It assembles around the chromosomes and distributes the duplicated genome to the daughter cells during mitosis.
Microtubules are unbranched, hollow, sub- microscopic tubules, which form the structural material of cilia, flagella, basal bodies, centrioles and spindle apparatus. They are built up protofilaments, formed of two related proteins, and - tubulins.
Number of chromosomes in an angiospermic plant is 14, then the number of chromosomes in synergid cells will be
14
7
28
21
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
In meiosis division is
Ist reductional and IInd equational
Ist equational and IInd reductional
both reductional
both equational
Colchicine prevents the mitosis of the cells at which of the following stage?
Anaphase
Metaphase
Prophase
Interphase
Lampbrush chromosomes are seen in which typical stage
mitotic anaphase
mitotic prophase
mitotic metaphase
meiotic prophase
The checkpoint in cell cycle plays important role in
repairing DNA damage
apoptosis initiation
assessing DNA damage
none of these
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