How is a cell formed?

Hint: Because they come in discrete and easily recognised bundles, cells are considered the basic units of life. That's because all cells are surrounded by a structure called the cell membrane, which acts as a clear barrier between the cell's internal and exterior environments, much like the walls of a house. The cell membrane is also called the plasma membrane. Cell membranes are made up of phospholipids, which are fat-based molecules that physically inhibit water-loving, or hydrophilic, substances from entering or leaving the cell.

Complete answer:
The cell cycle is the process through which new cells are generated from existing cells. One cell can duplicate itself, resulting in the formation of two new daughter cells.
Every cell cycle requires the completion of two major activities. Cells must first generate a perfect replica of their DNA. DNA is a key to a cell's instruction manual. It determines things like eye colour and hair colour by encoding genes for traits.
Chromosomes are chromosomes that organise DNA. Animal cells, including human cells, have numerous linear chromosomes, but most bacteria have just one circular chromosome. During the cell cycle's synthesis phase, or S phase, these chromosomes are reproduced.
The organisation and separation of replicated chromosomes into opposite sides of the cell is the second important task of every cell cycle. This occurs during the cell cycle's mitosis, or M phase.
The mitotic spindle is a molecular machine that cells construct during mitosis. Microtubules, which are filaments that develop and shrink, make up the mitotic spindle. The microtubules attach to the chromosomes and organise them so that they all line up in the cell's centre.
After lining up in the middle of the cell, the chromosomes separate to opposite sides while remaining attached to the microtubules.
The cell then develops longer, separating the chromosomal masses even further. In a process known as cytokinesis, the centre of the cell pinches off, separating the cell into two cells. The cell cycle is now complete because a new cell has been formed.

Note:
A cell is a prokaryote if the DNA within it is not isolated from the cytoplasm. Single cells make up all known prokaryotes, such as bacteria and archaea. A eukaryote, on the other hand, has its DNA partitioned off in its own membrane-bound compartment called the nucleus. Amoebae, for example, are free-living, single-celled eukaryotes. Multicellular organisms contain other eukaryotic cells. For example, all plants and animals are built up of eukaryotic cells, which might number in the trillions.