Question

Given above is a schematic break-up of the phases/stages of the cell cycle. Which one of the following is the correct indication of the stage/phase in the cell cycle?

A) A - Cytokinesis
B) B - Metaphase
C) C - Karyokinesis
D) D - Synthesis phase

Answer 1

The cell cycle is a chain of actions that occur in a cell that breaks into two daughter cells. Such actions also include duplication of its DNA (DNA replication) and most of its organelles, succeeded by the splitting of its cytosol and other elements into two daughter cells in response called cell division.

Complete answer:
Growth 0 will be the first of four stages of the cell cycle that occurs in the division of eukaryotes. In this part of interphase, the cell synthesizes mRNA and proteins in planning for subsequent mitosis-inducing steps. The G1 phase ends whenever the cell goes into the interphase S phase. It takes 40 % of the cell cycle period. S phase is the part of the cell cycle wherein DNA is replicated, existing among phase G1 and phase G2. Because precise replication of the genome is vital to functional cell division, the changes that occur during the S-phase are strictly regulated and broadly preserved.

The G2 phase is a period of tremendous cell proliferation and protein synthesis in which the cell trains for mitosis. Surprisingly, the G2 stage is not a mandatory process of the cell, as some forms of cells progress straight from DNA replication to cell division. Mitosis (M phase) is a phase of the cell cycle where the replicated chromosomes are divided into 2 new nuclei. Cell division ends in genetically similar cells for which the overall number of chromosomes is preserved. Thus, according to the above schematic sketch (D) indicates the synthesis phase and other options are not correctly matched.
Metaphase is a mitosis stage of the eukaryotes in which chromosomes are the second most prominent with karyokinesis known as the differentiation of the nucleus during the M phase of the cell cycle. It's the first step in the M phase, the condensed, and coiled stage. It also splits the genetic material equally. Cytokinesis accounts for "cytoplasmic separation." The cell enters karyokinesis first, where the nucleus is split up, and there is cytoplasmic division.

Hence, the correct answer is option (D).

Note: Cell division is a critical mechanism whereby a single-cell embryo grows into a mature organism, and also a process through which hair, skin, blood cells, and other organs are renewed. After mitosis, the interphase of a new cycle starts for each of the daughter cells. Different stages of the interphase are not usually morphologically distinctive, each stage of the cell cycle does have a unique collection of complicated biological pathways that equip the cell for cell division initialization.