Question

Cells at the end of prophase, when viewed under the microscope do not show
A) Golgi bodies and ER
B) Nucleolus and nuclear membrane
C) Chromosome and centromere
D) More than one option is correct

Answer 1

Hint:-Mitosis is a type of cell division where a cell divides into two identical daughter cells (in which the total number of chromosomes is maintained). The mitosis cell division occurs for the growth and replacement of worn-out cells. The stages of mitosis are prophase, metaphase, anaphase, and telophase.

Complete Answer:-
The first stage in both mitosis and meiosis of cell division is prophase. Two copies of the identical chromosomes are replicated forming sister chromatids during interphase. In the early prophase, the mitotic spindle starts to form, chromosomes start to condense, the nucleolus disappears along with the endoplasmic reticulum and the nuclear envelope breaks down. The prophase is divided into early and late prophase. The late prophase is also called prometaphase. During the late prophase, the nuclear lamina disintegrates the nuclear envelope. The nucleolar breakdown results in the stoppage of the production of ribosomes which further leads to the endoplasmic reticular disintegration. The nucleolus can be observed clearly in this phase as the chromatin material is condensed and compact and the nucleolus disappears by the end of this stage and these are not observed in late prophase. So when viewed under the microscope at the end of prophase, the cells do not show Golgi complexes, endoplasmic reticulum, nucleolus, and the nuclear envelope.
Thus, the right option is D.

Note:- The term mitosis was coined by Walther Flemming. Karyokinesis is another term coined by Schleicher and the term equational division was coined by August Weismann.