Prokaryotes are organisms that have cells that do not have a nucleus and any other organelles. The Prokaryotes are divided into two distinct groups: archaea and bacteria, which have evolved through a unique lineage.
Prokaryotic organisms are small single-celled organisms that have a very simple structure. The Prokaryotic cells have a plasma membrane. However, these do not have any internal membrane-bound organelles in their cytoplasm.
Do prokaryotes have a nucleus?
Nope, they don’t. Infact, the lack of the nucleus and the other membrane-bound organelles differentiate the prokaryotes from the eukaryotes.
Prokaryotes are abundant, come in different sizes and shapes, and make up a major part of the biomass of this planet.
The prokaryotic cells are usually 0.1 to 5 micrometers in length compared to eukaryotic cells which are much larger, between 10 to 100 micrometers.
The prokaryotic cells have a high surface area to volume ratio, and this is because they are small, and this lets them obtain a lot of nutrients through their plasma membrane.
Prokaryotic cells have a nucleoid region. This is an irregularly shaped region containing the cell's DNA, and it does not have a nuclear envelope.
The cell wall surrounding the cells in the prokaryotes protects the cell interior and helps maintain the cell's shape.
Prokaryotic cells contain cytoplasm, a gel-like fluid that fills up the cell. It also has a cytoskeleton that holds the cell components in its place.
These cells also have ribosomes:organelles that produce protein.
They also have vacuoles that are small spaces in the cell which store nutrients and help eliminate waste.
Some prokaryotes have flagella, which are structures in the form of a tail that allow the organism to move around.
These could also have pili which are small hair like structures that let the bacteria adhere to surfaces.
Organisms are placed in either one of the three major groups based on their cell type and other features. These three groups are called domains. They are Archaea, Bacteria & Eukarya.
Prokaryotes are found in the domains Archaea and Bacteria.
BACTERIA AS PROKARYOTES
ARCHAEA AS PROKARYOTES
1. What is the difference between a prokaryotic and a eukaryotic cell?
The prokaryotes do not have a true nucleus, and the nucleus does not have a nuclear membrane, and the eukaryotic cells are enclosed in a nuclear membrane. The prokaryotes also do not contain chloroplast and mitochondria in the eukaryotic cell.
2. Name some examples of prokaryotes.
Bacteria and Archaea are examples of prokaryotes.
3. What is the definition prokaryotic cell?
They are organisms that do not have a distinct nucleus and organelle.
4. Is a virus prokaryotic or eukaryotic?
Viruses are neither eukaryotes nor are they prokaryotes.
5. What is the main characteristic of the prokaryotic cells?
The prokaryotes cells go through asexual reproduction. Most pro cells divide through binary fission, where the cells divide and form two daughter cells. There is a difference in how the cells divide in prokaryotes because they do not pose a nuclear membrane surrounding their DNA.
6. What are the 8 basic parts of a prokaryotic cell?
The cells of the prokaryotes contain the following:
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