Do all cells have a nucleus?

Answer

All cells do not necessarily have a nucleus. Cells with a defined nucleus are called eukaryotic cells, while cells possessing no nucleus are called prokaryotic cells.

Eukaryotic cells have a defined nucleus, otherwise called the "brain" of the cell. This nucleus is surrounded by a membrane which separates the nucleus from the other clearly defined parts of the cell, called organelles. Examples of organelles are mitochondria and chloroplasts. Eukaryotic cells have the ability to become any type of tissue, based on their specific DNA.

Prokaryotic cells do not have a defined nucleus with a membrane, and typically lack the organelles of a eukaryotic cell. The DNA is contained within the cell walls in a random fashion. Due to the lack of organization, prokaryotic cells are extremely limited in size and are typically hundreds of times smaller than the average eukaryotic cell. The most common example of prokaryotic cells is bacteria.

Reference:
Q&A Related to "Do all cells have a nucleus?"
Prokaryotic.
http://wiki.answers.com/Q/What_cells_do_not_have_a...
All mammals bear live young, nurse their babies, are warm blooded and have a longer childhood than reptiles. Reptiles lay eggs, are cold blooded and do not care for their babies very
http://www.ask.com/web-answers/Science/Other/what_...
Red blood cells, or erythrocytes, do not have a nucleus.
http://wiki.answers.com/Q/What_examples_are_names_...
it would die
http://wiki.answers.com/Q/What_if_a_plant_cell_did...
Explore this Topic
The nucleus is the central part of a cell. The nucleus consists of all DNA and RNA information. The nucleus is the main part of a cell, kind of like the brain ...
The division of the cell nucleus is called either mitosis or meiosis, depending on which type of division has occurred. Meiosis is a type of cell nucleus division ...
Prokaryotic cells lack a nucleus. Bacteria and members of the domain Archaea are prokaryotes, while plants, animals, protists and fungi are eukaryotes. Prokaryotic ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com