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NEET UG 2026 » NEET UG Study Material » Biology » Prokaryotes
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Prokaryotes

In this article, we'll first look at major groups of prokaryotes. Then, we'll explore why it’s often tricky to identify and classify them. Finally, we'll see how DNA sequencing methods are helping.

Table of Content
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All cells can be divided into one of two broad classifications. Single-celled organisms belonging to the domains Bacteria and Archaea are classified as prokaryotes; the term “pro” refers to before and “kary” refers to the nucleus. Animals, plants, fungi, and protists are all classified as eukaryotes (the word eukaryotes means true) and are composed of eukaryotic cells. 

Prokaryotic cell components are classified as follows:

No matter whether a cell is prokaryotic or eukaryotic, there are some essential components that every cell requires to function properly. All cells have four essential components in common:

The plasma membrane is an outer covering that separates the interior of the cell from the rest of the cell’s surrounding environment.

The cytoplasm of a cell is made up of the jelly-like cytosol found within the cell, as well as the cellular structures suspended within it. In eukaryotes, the term “cytoplasm” refers to the region outside the nucleus but inside the plasma membrane that contains the cell’s nucleus.

The genetic material of the cell is represented by the letter DNA.

Ribosomes are molecular machines that are involved in the production of proteins.

Despite their similarities, prokaryotes and eukaryotes differ from one another in several critical respects. A prokaryote is a simple, single-celled organism that does not have a nucleus or organelles that are attached to membranes. We’ll go into more detail about the nucleus and organelles in the next article on eukaryotic cells, but for now, the most important thing to remember is that prokaryotic cells are not divided on the inside by membrane walls, but instead consist of a single open space. We’ll go into more detail about the nucleus and organelles in the next article on eukaryotic cells.

The nucleoid, which is located in the centre of the cell and typically consists of a single large loop known as a circular chromosome, contains the vast majority of prokaryotic text DNA. The text DNA begins with the letters D, N, A, and ends with the letters E. The text DNA begins with the letters D, N, A, and ends with the letters E. It is possible to see the nucleoid and some other frequently observed features of prokaryotes in the diagram below, which depicts a cut-away of a rod-shaped bacterium.

Conclusion:-

Prokaryotes and eukaryotes are both different and similar in many ways. The main thing to take away from this report is that prokaryotes are without a nucleus while eukaryotes have a nucleus. Also, prokaryotes maintain a single chromosome while eukaryotes have multiple chromosomes.

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Frequently asked questions

Get answers to the most common queries related to the NEET UG Examination Preparation.

How do you define the term "prokaryotic cell"?

Ans:-A prokaryotic cell is defined as a cell that lacks a clearly defined nucleus as well as membrane-bound organell...Read full

How can probiotics be beneficial to human health?

Ans: The answer is yes, probiotics are beneficial bacteria that help to keep your body healthy and its functions run...Read full

What is the process by which a prokaryotic cell divides?

Ans:-Prokaryotic cells reproduce asexually, as explained above. The majority of prokaryotic cells divide by binary f...Read full

When did prokaryotic cells first appear on the scene?

Ans: Around 3.5 billion years ago, the first prokaryotic cells appeared on the scene. The eukaryotic cells are thoug...Read full

Which of the following are the major components of a Prokaryotic cell?

Ans: Prokaryotic cells, which are single-celled microbes, are thought to be the most ancient organisms on the planet...Read full

Ans:-A prokaryotic cell is defined as a cell that lacks a clearly defined nucleus as well as membrane-bound organelles such as mitochondria and lysosomes, among other characteristics. A prokaryote is an organism that contains a prokaryotic cell, and they are most commonly found in bacteria.

Even though the majority of bacteria cause disease, some are beneficial. The following are the functions of these prokaryotic cells:

Food Digestive Processes: bacteria such as lactobacillus aid in the digestion of lactose in the stomach by producing lactic acid.

Inhibition of Pathogens: Gut flora is also important in our body’s defence against pathogens, as previously stated.

The development of enteric protection occurs during the first two years of life when the gut flora (bacteria) is established. As soon as it is established, the intestinal lining develops as well as the ability to defend the gut bacteria against pathogens that can enter the stomach through food.

Ans: The answer is yes, probiotics are beneficial bacteria that help to keep your body healthy and its functions running smoothly. They help you in a variety of ways, including fighting off bad bacteria when there is an overabundance of it and making you feel more comfortable. If you think about it, probiotics are part of a larger picture that includes bacteria and your body, which is known as your microbiome. It is possible to find probiotics in foods that contain the bacteria lactobacillus and bifidobacterium. Today, a wide variety of products are available that contain probiotics, which are extremely beneficial to gut health. Dietary supplements that contain probiotics are used to aid digestion and restore a healthy flora balance. Probiotics have been used to treat a variety of conditions, including dermatitis, vaginal yeast infections, lactose intolerance, urinary tract infections, and gastrointestinal issues, among others (such as diarrhoea and irritable bowel syndrome).

Ans:-Prokaryotic cells reproduce asexually, as explained above. The majority of prokaryotic cells divide by binary fission, in which the cells divide into two daughter cells, rather than by fusion.

Ans: Around 3.5 billion years ago, the first prokaryotic cells appeared on the scene. The eukaryotic cells are thought to have evolved from the prokaryotic cells, which were formed after the eukaryotic cells.

Ans: Prokaryotic cells, which are single-celled microbes, are thought to be the most ancient organisms on the planet. Bacteria and Archaea are both classified as prokaryotic organisms. Cyanobacteria are photosynthetic prokaryotes, which means that they are capable of photosynthesis.

Because a prokaryotic cell has only one membrane, all reactions take place within the cytoplasm of the organism. They could be parasites or they could be free-living.

A cell, regardless of whether it is prokaryotic or eukaryotic, requires several essential components for the organism to function properly. All cells have four important components in common. These are as follows:

The plasma membrane is an external layer that separates the interior of the cell from the rest of the cell’s environment.

The cytoplasm is made up of the jelly-like cytosol found inside the cell, as well as the cellular structures that are suspended within it.

In eukaryotes, the term “cytoplasm” refers to the region of the cell that is outside the nucleus but inside the plasma membrane.

Ribosomes are a type of molecule that is involved in the protein synthesis process.

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