Question

During which phase can nucleolus be observed clearly?
A) Metaphase-II
B) Early Prophase
C) Anaphase
D) Metaphase

Answer 1

Hint:- Cell division is the process in which a cell divides into two or more daughter cells. 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). Meiosis is a type of cell division in which a single cell divides to produce four cells. It involves two rounds of division that result in daughter cells with only one copy of each chromosome.

Complete Answer:-
Metaphase-II is the second stage in meiosis II after prophase II and highlights the chromosomal alignment along a single plane in the center of the cell. In the Early prophase, the mitotic spindle starts to form, and chromosomes start to condense, and the nucleolus disappears. 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.
Anaphase is the stage after the metaphase, during this phase the replicated chromosomes are split and the newly-copied chromosomes (called the daughter chromatids) are moved to the opposite poles of the cell. Metaphase is a stage during which all the genetic material is condensed into chromosomes. These chromosomes then become visible. These chromosomes then align in the equator of the cell before being separated into the two daughter cells.
Thus, the right option is B.

Note:- The nucleolus is the largest nuclear structure present in the eukaryotic cells the nucleolus is composed of RNA and proteins. It participates in assembling the ribosomes in their biogenesis and alteration of transfer RNA. Nucleoli also help in signal recognition particles and have a role in the stress responses.