The major events of mitotic prophase include cell of the following except (A) Initiation of the assembly of mitosis spindles, helped by cytoplasmic proteinaceous microtubules (B) DNA replication (C) Nuclear membrane breakdown and nucleolar disaggregation (D) Condensation of chromosomal materials to form compact chromosomes

Answer the following questions regarding the events carried out in the labelled parts of the ab ove given diagram. (1) DNA synthesis occurs in (2) Condenstaion of chromosomal material takes place in (3) Attachement of spindle fibres to kinetochores of chromosomes during (4) Initiation of the assembly of mitotic spindle during (5). Splitting of centromere and separation of chromatids in (6) Movement of chromatids to opposite poles during (7) Reformation of nucleolus, Golgi complex and ER occurs in (8) Alignment of chromosomes along metaphase plate during (9) During of cytoplasm during (10) Preparation of cell division takes place during.

Choose the correct statements with respect to the completion of prophase I. Chromosomal material condenses to from compact mitotic chromosomes. Chromosomes are seen to be composed of two chromatids attached together at the centromere. II. Initiation of the assembly of mitotic spindle, the microtubules, the proteinaceous components of the cell cytoplasm III. Cells at the end of prophase, when viewed under the microscope, do not show golgi complexes, endoplasmic reticulum, nucleolus and the nuclear envelope

Arrange the following events of mitotic cell cycle in correct sequence I. Initiation of spindle formation II. DNA replication III. Disappearance of Golgi complex, E.R and nuclear membrane IV. Movement of chromosome towards the poles V. Decondensation of chromosomes

The following events occur during the various phases of the cell cycle. Name the phase against each of the events. (a) Disintegration of nuclear membrane..... (b) Appearance of nucleolus..... (c) Division of centromere .... (d) Replication of DNA...

The events shown below occur during different phases - A. Centromere splits, chromatids separate and move to opposite poles, chromatids are now called chromosome B. Chromosomes cluster at opposite poles, decondensation of chromosome, reappearance of NM, GB and ER. C. Chromosomal replication D. Kinetochores attach to spindle fibres and chromosome are arranged at equatorial plate E. Condensation of chromosomal materials Which or the following correctly identifies each of the phases described-

Following are some events of mitotic cell division, select the correct order in which these events occur . (i) Condensation of chromosomes is completely (ii) chromosomes lose their identity as discrete elements (iii) Sister chromatids separate (iv) Initiation of the assembly of the mitotic spindle