11. During which phase can nucleolus be observed clearly ?
12. Which structure can be observed at the surface of centromere during metaphase ?
13. Mitosis actually means......
A. Reduction in number of chromosomes
B. Division of nucleus only
C. Division of cytoplasm only
D. Both nuclear (Karyokinesis) and cytoplasmic divisions.
Answer : Option D
14. The role of mitosis is not merely to divide a cell into two daugher cells but to ensure genetic continuity from one cell generation. The mechanism ensuring genetic continutity is;
A. Formation of two cells with identical DNA
B. The new cells have half the number of chromosomes.
C. Formation of cell by new chromosome
D. Formation of two daughter cells
Answer : Option A
15. Substances that interface with microtubule function interfare with cell division because....
A. Microtubules are distributed equally in the new cells
B. Microtubules are involved in precise separate set of chromosomes get into each daughter cells.
C. Without microtubules, cytokinesis cannot take place and a membrane is formed.
D. Microtubules are essential for the disappearince of the nuclear membrane and without them the chromosomes have to stay close together within the nuclear membrave to be able to separate into two new nuclei.
Answer : Option B
16. The stage of mitosis during which the nucleolus disintegrates and chromosomes appear is known as
17. Chromosomes can be counted during :
18. The nuclear membrane disintegrates and spindle appears at :
19. The separation of two chomatids of each chromosome during early anaphase is initiated by :
A. The interaction of centromere with the chromosomal fibres.
B. The elongation of metaphytic spindle
C. Attachment of spindle fibres with Kinetochore
D. All the above
Answer : Option C
20. The telophase stage of mitosis is.......
A. The last stage of karyokinesis
B. More or less opposite of prophase stage.
C. The stage where spindle fibres are abosorbed in cytoplasm
D. All of the above
Answer : Option D