Multiple Choice QuestionsCells in G0 phase of cell cycle
exit cell cycle
enter cell cycle
suspend cell cycle
terminate cell cycle
In which stage of the first meiotic division two sister chromatids are formed?
Leptotene
Zygotene
Pachytene
Diplotene
The correct sequence of different phases of cell cycle is
S - G1 - G2 - M
G1 - S - G2 - M
G2 - S - G1 - M
G1 - G2 - S - M
The complex formed by a pair of synapsed homologous chromosomes is called
equatorial plate
kinetochore
bivalent
axoneme
C.
bivalent
Synapsis is the pairing of homologous chromosomes. Each pair is called bivalent. Chromosomes line up around the equator of the spindle, attached by their centromeres to the spindle fibres, which are microtubules. The microtubules forming spindles can be of two types, i.e., kinetochore microtubule and non-kinetochore microtubule.
Axoneme is the central core of a cilium or flagellum consisting of a central pair of filaments surrounded by nine other pairs.
Equatorial plate is the plane located midway between the poles of a dividing cell during the metaphase stage of mitosis or meiosis. It is formed from the migration of the chromosome to the centre of the spindle.
A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics
Telophase - Nuclear envelope reforms, Golgi complex reforms
Late anaphase - Chromosomes move away from equatorial plate, Golgi complex not present
Cytokinesis - Cell plate formed, mitochondria distributed between two daughter cells
Telophase - Endoplasmic reticulum and nucleolus not reformed yet
Select the correct statement related to mitosis.
Amount of DNA in the parent cell is first halved and then distributed into two daughter cells
Amount of DNA in the parent cell is first doubled and then distributed into two daughter cells
Amount of DNA in the parent cell is first halved and then distributed into four daughter cells
Amount of DNA in the parent cell is first doubled and then distributed into four daughter cells
Proteins helping in kinetocore formation of yeast are
CBF2 and Kar3 P
CBF2 and CBF3
CBF3 and Kar3 P
CBF2, CBF3 and Kar3 P
Which one of the following is wrong for meiosis?
It leads to formation of sister chromatids
It occurs in diploid cell
It occurs in haploid cell
It occurs by splitting of centromeres and separation of sister chromatids
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