Name: cell organization in prokaryotes and eukaryotes
Uploaded: 2025-06-12T09:28:11.000Z
Duration: 1 min 28 s
Channel: JoVE

K12 Standards

north-carolina-k-12-science-standard-course-of-study

North Carolina K-12 Science Standard Course of Study

9-12

Biology

from-molecules-to-organisms-structures-and-processes

From Molecules to Organisms- Structures and Processes

LS.Bio.1.4

Prokaryotic vs. Eukaryotic Cells

Prokaryotik ve ökaryotik hücreler yapı ve işlev bakımından önemli ölçüde farklılık gösterir. Bakteriler ve arkeler gibi prokaryotik hücreler basittir ve çekirdek de dahil olmak üzere zara bağlı organellerden yoksundur. Tipik olarak tek hücreli ve küçüktürler, uzunlukları 0,1 ila 5,0 mikrometre arasında değişir. Genomları, nükleoid bölgede tek, dairesel bir DNA molekülü içerir. Prokaryotlar, ökaryotik ribozomlara kıyasla daha küçük olan 70S ribozomlarına sahiptir. Genellikle ikili fisyon yoluyla hızlı büyüme ve üremeye izin veren daha basit iç yapılara sahiptirler. Tersine, bitkilerde, hayvanlarda, mantarlarda ve protozoalarda bulunan ökaryotik hücreler daha karmaşıktır. Hücresel fonksiyonların bölümlere ayrılmasına izin veren çekirdek, mitokondri ve endoplazmik retikulum gibi zara bağlı organeller içerirler. Çekirdekte depolanan doğrusal DNA'dan yapılmış büyük genomlara sahiptirler. Ökaryotik hücreler 10 ila 100 mikrometre veya daha fazlasını ölçer ve karmaşık biyolojik işlevler için özel hücre tiplerine sahip çok hücreli organizmalar oluşturabilir. Ayrıca, karmaşık protein sentez makinelerini yansıtan daha büyük 80S ribozomlarına sahiptirler.

prokaryotik ve ökaryotik hücreler

Prokaryotik ve &#246;karyotik h&#252;creler, yap&#305;, karma&#351;&#305;kl&#305;k ve i&#351;lev a&#231;&#305;s&#305;ndan &#246;nemli &#246;l&#231;&#252;de farkl&#305;l&#305;k g&#246;steren iki temel h&#252;cresel organizasyon tipini temsil eder. Bu ayr&#305;mlar, ya&#351;am&#305;n alanlar&#305; boyunca g&#246;zlenen biyolojik &#231;e&#351;itlili&#287;in temelini olu&#351;turur.
Prokaryotik H&#252;cre &#214;zellikleri
Bakteri ve arkelerle &#246;rneklenen prokaryotik h&#252;creler, yap&#305;sal olarak basittir ve zarl&#305; organeller, &#246;zellikle de bir &#231;ekirdek i&#231;ermezler. Genetik materyalleri, &#231;ekirdek zar&#305;yla &#231;evrili olmayan n&#252;kleoid b&#246;lgesinde bulunan tek bir dairesel DNA molek&#252;l&#252;nden olu&#351;ur. Prokaryotlar genellikle k&#252;&#231;&#252;kt&#252;r; boyutlar&#305; 0.1 ila 5.0 mikrometre aras&#305;nda de&#287;i&#351;ir ve neredeyse tamam&#305; tek h&#252;crelidir. Ancak bu basit yap&#305;ya ra&#287;men, h&#305;zl&#305; ikili b&#246;l&#252;nme yoluyla &#231;o&#287;alarak etkili bir b&#252;y&#252;me ve &#252;reme yetene&#287;i g&#246;sterirler. Prokaryotlarda bulunan ribozomlar 70S b&#252;y&#252;kl&#252;&#287;&#252;ndedir; bu ribozomlar, &#246;karyotik ribozomlara g&#246;re daha k&#252;&#231;&#252;k ve daha basit olmalar&#305;na ra&#287;men, protein sentezi ihtiya&#231;lar&#305;n&#305; kar&#351;&#305;lamada yeterlidir.
&#214;karyotik H&#252;cre &#214;zellikleri
Buna kar&#351;&#305;l&#305;k, mantarlar, algler, protozoalar ve di&#287;er protistlerde bulunan &#246;karyotik h&#252;creler olduk&#231;a karma&#351;&#305;kt&#305;r. Bu h&#252;creler, do&#287;rusal DNA'n&#305;n kromozomlar halinde yer ald&#305;&#287;&#305; &#231;ekirdek gibi zarl&#305; organellerle karakterize edilir. Mitokondri, endoplazmik retikulum ve Golgi ayg&#305;t&#305; gibi di&#287;er organeller, h&#252;cresel i&#351;levlerin b&#246;l&#252;mlere ayr&#305;lmas&#305;n&#305; sa&#287;layarak verimlili&#287;i ve uzmanla&#351;may&#305; art&#305;r&#305;r. &#214;karyotik h&#252;creler belirgin &#351;ekilde daha b&#252;y&#252;kt&#252;r; boyutlar&#305; genellikle 10 ila 100 mikrometre veya daha fazlas&#305;na ula&#351;&#305;r ve &#246;zelle&#351;mi&#351; h&#252;cre tiplerine sahip &#231;ok h&#252;creli organizmalar olu&#351;turabilirler. Daha b&#252;y&#252;k olan 80S ribozomlar&#305;, yap&#305;sal ve i&#351;levsel a&#231;&#305;dan daha geli&#351;mi&#351; olan protein sentezi d&#252;zeneklerinin bir yans&#305;mas&#305;d&#305;r ve bu karma&#351;&#305;k h&#252;cresel sistemin gereksinimlerini kar&#351;&#305;lamada rol oynar.
&#304;&#351;levsel ve Evrimsel Sonu&#231;lar
H&#252;cre yap&#305;s&#305; ve organizasyonundaki bu temel farkl&#305;l&#305;klar, prokaryotlar&#305;n &#231;e&#351;itli ortamlarda h&#305;zl&#305; adaptasyonla ya&#351;amalar&#305;n&#305; m&#252;mk&#252;n k&#305;lar. Buna kar&#351;&#305;l&#305;k, &#246;karyotik h&#252;creler &#231;ok h&#252;creli organizmalarda y&#252;ksek d&#252;zeyde &#246;zelle&#351;mi&#351; doku ve sistemlerin geli&#351;imini destekler. &#214;karyotik h&#252;crelerdeki b&#246;l&#252;mlenme ve artan karma&#351;&#305;kl&#305;k, evrimsel a&#231;&#305;dan &#246;nemli bir ilerlemeyi temsil eder; bu da karma&#351;&#305;k biyolojik s&#252;re&#231;lerin ve daha y&#252;ksek d&#252;zeyde organizma yap&#305;lar&#305;n ortaya &#231;&#305;kmas&#305;na olanak tan&#305;r.

Prokaryotik ve ökaryotik hücreler

Prokaryotik ve &#246;karyotik h&#252;creler, yap&#305;, karma&#351;&#305;kl&#305;k ve i&#351;lev a&#231;&#305;s&#305;ndan &#246;nemli ...

Education

JoVE Core

Microbiology

Mikrobiyoloji

Unit

Birim

Microbial Cell Structure and Function        

Mikrobiyal Hücre Yapısı ve İşlevi

KEY TERMS AND CONCEPTS

TEMEL TERİMLER VE KAVRAMLAR

cell organization in prokaryotes and eukaryotes

Prokaryotic and eukaryotic cells show two major patterns of cell organization. These differences shape the structure, size, and function of living things across the domains of life.

Prokaryotic cells, such as bacteria and archaea, are simple in structure. They do not have a nucleus or other membrane-bound organelles. Their DNA is usually a single circular molecule found in the nucleoid region, which is not surrounded by a nuclear membrane. Prokaryotes are usually very small, about 0.1 to 5.0 micrometers, and they are almost always unicellular.

Even with this simple design, prokaryotes grow and reproduce efficiently. Many divide quickly by binary fission, a form of cell division that makes two new cells. They also contain 70S ribosomes, which are smaller than the ribosomes found in eukaryotic cells and still support protein synthesis.

Eukaryotic cells are more complex and are found in fungi, algae, protozoa, and other protists. They have a nucleus that contains linear DNA arranged into chromosomes. They also have membrane-bound organelles such as mitochondria, the endoplasmic reticulum, and the Golgi apparatus. These internal compartments help separate tasks and make cell functions more efficient.

Eukaryotic cells are much larger, often measuring 10 to 100 micrometers or more. They can also form multicellular organisms with specialized cell types. Their 80S ribosomes are larger than prokaryotic ribosomes and support the protein production needed for this more complex organization.

These differences help explain why prokaryotes can adapt quickly in many environments. Eukaryotic cells, in contrast, support specialized tissues and body systems in multicellular life. Their compartmentalized structure is an important evolutionary step that allows more complex biological processes.

Cell Organization in Prokaryotes and Eukaryotes

cell-organization-in-prokaryotes-and-eukaryotes

prokaryotic vs. eukaryotic cells

Prokaryotic and eukaryotic cells show two major patterns of cell organization. These differences shape the structure, size, and function of living things across the domains of life. Prokaryotic cells, such as bacteria and archaea, are simple in structure. They do not have a nucleus or other membrane-bound organelles. Their DNA is usually a single circular molecule found in the nucleoid region, which is not surrounded by a nuclear membrane. Prokaryotes are usually very small, about 0.1 to 5.0...

microbial morphologies 

Microbial Shapes and Cell Forms

Microbial shapes and cell forms help bacteria, archaea, and eukaryotic microbes survive in many environments. Cell shape affects how these organisms grow, take up nutrients, and handle waste. It also reflects the link between structure and function. Among bacteria, cocci and bacilli are the most common shapes. Cocci are spherical cells, and they may appear alone or in pairs called diplococci, chains called streptococci, clusters called staphylococci, or groups of four called tetrads. Bacilli...

bacterial cell wall 

Gram-Positive and Gram-Negative Walls

Bacterial cell walls give bacteria their shape and help protect them from osmotic stress. This rigid but flexible layer surrounds the plasma membrane and supports cellular integrity. Its main building block is peptidoglycan, a mesh-like polymer that adds strength while still allowing some flexibility. Peptidoglycan is made of alternating N-acetylglucosamine, or NAG, and N-acetylmuramic acid, or NAM. Short amino acid chains connect these sugar units and help form the strong network. The...

archaeal cell wall

Archaeal Cell Wall Types and Functions

Archaeal cell walls protect archaea and help them survive in extreme environments. Unlike bacterial cell walls, they do not have the peptidoglycan layer found in most bacteria. Instead, archaea use a range of materials, including proteins, polysaccharides, and pseudomurein, to build their outer layer. The most common archaeal cell wall is the S-layer, or surface layer. It is made of tightly packed protein or glycoprotein units that form a crystalline lattice. These repeating patterns can make...

peptidoglycan synthesis

Building the Bacterial Cell Wall

Peptidoglycan builds the bacterial cell wall and gives the cell its shape and strength. It is a mesh-like polymer around the bacterial plasma membrane. The polymer is made of repeating sugar units, N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM), linked by β-1,4 glycosidic bonds. Short peptide chains cross-link the sugar chains and make the wall more rigid. Peptidoglycan biosynthesis starts in the cytoplasm with soluble precursors. Uridine diphosphate, or UDP, binds to NAG and NAM to...

plasma membrane in bacteria and archaea

Bacterial vs Archaeal Membrane Lipids

Bacterial and archaeal plasma membranes control what enters and leaves the cell. They also help maintain cell integrity. Although both membranes do the same basic job, their structures are different because bacteria and archaea face different environmental demands. Bacterial plasma membranes are mainly made of phospholipids. These lipids have fatty acid chains linked to a glycerol backbone by ester bonds. They form a bilayer, with hydrophilic glycerol-phosphate heads facing outward and...

outer layers of the cell envelope

Capsules, Slime Layers, and S-Layers

Capsules, slime layers, and S-layers are outer coverings on prokaryotic cells. These layers help bacteria and archaea survive, attach to surfaces, and interact with their environment. They are often made of polysaccharides, polypeptides, proteins, or glycoproteins. Capsules are tightly bound and highly organized layers that stick firmly to the bacterial cell wall. They are usually made of polysaccharides, although some are made of polypeptides. A capsule protects cells from dehydration and can...

flagella and motility in bacteria

Bacterial Flagella as Tiny Rotary Motors

Bacterial flagella are thread-like structures that help cells move and respond to their surroundings. They extend from the cell envelope and support both motility and chemotaxis, which is the ability to move in response to chemical signals. Their design shows how bacteria use specialized structures to survive in different environments. A flagellum has three main parts: the filament, the hook, and the basal body. The filament is the long, helical part made of repeating flagellin protein...

fimbriae, pili, and axial filaments

How Bacteria Stick, Share Genes, and Move

Fimbriae, pili, and axial filaments are bacterial surface structures that help cells attach, exchange genes, and move. These hairlike appendages are made mainly of pilin protein. They support bacterial survival in different environments and can also increase pathogenicity. Fimbriae are fine, filament-like structures that are densely packed on the bacterial surface. They are about 2 to 10 nanometers wide and help bacteria attach to nonliving surfaces and to host tissues. This adhesion is an...

cell inclusions

Prokaryotic Cell Storage Inclusions

Prokaryotic cell storage inclusions help bacteria store nutrients, manage energy, and adapt to changing environments. These inclusions let cells survive when food, phosphate, sulfur, light, or oxygen levels change. They are important examples of how simple cells can still have highly specialized structures. Some inclusions store carbon. Poly-β-hydroxybutyric acid, or PHB, forms granules that act as a long-term carbon and energy reserve. Glycogen granules also store carbon, but they provide a...

endospores and sporulation

How Bacteria Survive with Endospores

Endospores help some bacteria survive harsh conditions. These dormant cells are made mainly by Gram-positive bacteria such as Bacillus and Clostridium. They are highly resistant to heat, ultraviolet and ionizing radiation, drying, and toxic chemicals. In rare cases, endospore-like structures have also been seen in some Gram-negative bacteria, including Coxiella burnetii and Sporosarcina ureae, as well as in other species exposed to extreme conditions. Sporulation begins when bacteria face...

nucleoid

How Prokaryotes Organize DNA

Prokaryotes organize their DNA in the nucleoid, a distinct region where genetic material and associated proteins are packed. Because prokaryotic cells do not have a membrane-bound nucleus, the nucleoid helps keep DNA organized and available for cell activities. In most bacteria and archaea, the DNA is a single, circular, double-stranded molecule that is tightly compacted by supercoiling and protein interactions. Nucleoid-associated proteins, or NAPs, help shape and maintain this DNA region.

surface appendages of archaea

Archaeal Pili and Archaella in Action

Archaeal pili and archaella help archaea survive, attach, and move in challenging environments. These surface appendages support adhesion, biofilm formation, and motility. They give archaeal cells key advantages in habitats that can be extreme. Pili are filament-like structures made from pilin protein subunits. Their main role is adhesion, which means helping cells stick to surfaces. They also support biofilm formation, where cells live in a shared, surface-attached community. Some pili are...

key terms and concepts

Compare prokaryotic and eukaryotic cell organization, from nuclei and organelles to DNA shape, size, ribosomes, and cell division in grades 9–12.

Cell Organization in Prokaryotes and Eukaryotes | JoVE K12

JoVE Core Microbiology provides an engaging introduction to the microbial world and its influence on health, industry, and the environment. This comprehensive collection covers key concepts such as microbial structure, metabolism, genetics, and ecology. It introduces essential laboratory techniques and microscopy methods through visually engaging animations. Corresponding scientist-in-action videos bridge classroom concepts with real-world research and applications.

microbiology

Virginia  Standards of Learning

HIgh School

BIO.3

BIO.3.b

BIO.4

BIO.4.c

BIO.6

BIO.6.a

Life Science

LS.2

LS.2.c

new-york-state-science-learning-standards

New York State Science Learning Standards

Middle School

Earth and Space Sciences

Space Systems

MS-ESS1-1

Minnesota Academic Standards in Science

Earth and Space Science

1.1.1 Earth’s Place in the Universe

4.2.2

south-carolina-college-and-career-ready-science-standards

South Carolina College and Career Ready Science Standards

Earth's Place in the Universe

8-ESS1-1

8-ESS1-2

8-ESS1-3

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Macromolecules

Biomolecules
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lipid-derived-compounds-in-the-human-body

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LS.Bio.1.1

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Catalytically Perfect Enzymes

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introduction-to-mechanisms-of-enzyme-catalysis

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LS.Bio.1.2

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Cells are the smallest and basic units of life, whether it is a single cell that forms the entire organism, e.g., in a bacterium or trillions of them, ...

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Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (&#x3BC;m)and are considerably smaller than most ...

Eukaryotic Compartmentalization

One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles, such as the nucleus and mitochondria, that carry ...

Prokaryotic Cells

Prokaryotes are small unicellular organisms that include the domains&#x2014;Archaea and Bacteria. Bacteria include many common organisms, such as ...

Cytoplasm

The cytoplasm consists of organelles and a framework of protein scaffolds called the cytoskeleton suspended in an aqueous solution, the cytosol. The ...

The Nucleus

The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression ...

Endoplasmic Reticulum

Endoplasmic ReticulumThe endoplasmic reticulum (ER) is an extensive network of membranous sacs and tubules in eukaryotic cells, continuous with the outer ...

Ribosomes

Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that ...

Golgi Apparatus

As they leave the Endoplasmic Reticulum (ER), properly folded and assembled proteins are selectively packaged into vesicles. These vesicles are ...

Lysosomes

Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules ...

Peroxisomes

Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration&#x2014;the ...

Introduction to the Cytoskeleton

Overview of the Cytoskeleton
The cytoskeleton is a network of protein filaments present within the cell, having three distinct filaments ...

Introduction to Actin

Actin is a highly conserved cytoskeletal protein found abundantly in eukaryotic cells. It constitutes 10% weight of the total cellular protein in muscle ...

Cell Structure

Background
Cells represent the most basic biological units of all organisms, whether it be simple, single-celled organisms like bacteria, or large, ...

overview-of-myosin-structure-and-function

Overview of Myosin Structure and Function

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Visualizing Onion and Cheek Cells
ExpandImmediately before the experiment, wash and peel onion bulbs for the class.
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Microtubules

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The Structure of Intermediate Filaments

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Types of Intermediate Filaments

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Gap Junctions

Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between ...

The Extracellular Matrix

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Tissues

Cells with similar structure and function are grouped into tissues. A group of tissues with a specialized function is called an organ. There are four main ...

Plant Cell Wall

The plant cell wall gives plant cells shape, support, and protection. As a cell matures, its cell wall specializes according to the cell type. For ...

Use models to explain how the structure of organelles determines its function and supports overall cell processes.

LS.Bio.1.3

Analyze how the relationship between structure and function supports life processes within organisms.

Cell Organization in Prokaryotes and Eukaryotes

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