Biology : Cell Cycle and Cell Division

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

Which of the followings does not occur in the interphase of eukaryotic cell division?

• Increase of ATP synthesis

• Increase of DNA synthesis

• Increase of RNA synthesis

• Reduction in cell size

Match the item in column I with those in column II and the choose the correct answer.

Column I	Column II
A. Mitosis	1. Occurs in diploid cells only
B. Meiosis	2. Occurs in both haploid and diploid cells
	3. Daughter and parent cells have same chromosome numbers
	4. Synapsis of homologous chromosomes.

• A- 1; B- 2

• A- 2; B- 3

• A- 3; B- 4

• A- 4; B- 1

During mitosis nuclear membrane disappears at

• early prophase

• late prophase

• metaphase

• anaphase

Spindle fibres of mitotic cell are made up of

• tubulin

• actin

• myosin

• collagen

During meiosis crossing over occurs at

• pachytene

• zygotene

• leptotene

• diakinesis

During meiosis crossing over occurs between which part of homologous chromosome ?

• Sister chromatids

• Non-sister chromatids

• Genes

• Alleles

In cell cycle, during, which phase chromosomes are arranged in equatorial plate ?

• Metaphase

• Anaphase

• Telophase

• Prophase

In synapsis two homologous chromosomes are connected at

• centromeres

• chromomeres

• telomeres

• none of these

Stages in proper sequence of prophase- I are

• zygotene, leptotene, pachytene, diakinesis

• leptotene, zygotene, pachytene, diplotene and diakinesis

• eptotene, pachytene, zygotene, diakinesis and diplotene

• diplotene, diakinesis, pachytene, zygotene and leptotene