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Il y a 6 jours · Eukaryote is any cell or organism that possesses a clearly defined nucleus. Learn about the evolution, characteristics, and examples of eukaryotes, and how they differ from prokaryotes.
- Eukaryote
Encyclopædia Britannica, Inc. A eukaryote is a cell or...
- Eukaryote
Eukaryotic cells contain membrane-bound organelles such as the nucleus, the endoplasmic reticulum, and the Golgi apparatus. Eukaryotes may be either unicellular or multicellular. In comparison, prokaryotes are typically unicellular. Unicellular eukaryotes are sometimes called protists.
Eukaryotic cells have a nucleus, which is the site of DNA and protein synthesis. Learn how the nucleus evolved and how it differs from prokaryotic cells and other eukaryotic organelles.
- Overview
- Introduction
- Prokaryotic vs. eukaryotic cells
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Overview of eukaryotic cells and how they differ from prokaryotic cells (nucleus, organelles, and linear chromosomes).
What would it be like to live in a one-room cabin? Well, things would probably be pretty simple. You would eat, sleep, work, and relax in a single room—which might be a bit cramped, but would certainly make cleaning the house a snap!
Prokaryotic cells, the simple cells of organisms like bacteria, are sometimes compared to one-room cabins: they don't have internal membranes, so they’re like a single room with no walls to carve it up1 . If we extend this analogy to eukaryotic cells, the more complex cells that make up plants, fungi, and animals, we'll find that they're a definite step upward in the real estate market.
Just as a large family home is split into many rooms with different purposes (bedrooms, bathrooms, kitchen, living room, etc.), so eukaryotic cells contain a variety of different compartments with specialized functions, neatly separated from one another by layers of membrane. This organization lets each compartment maintain its own conditions, the ones it needs to carry out its job.
For instance, compartments called lysosomes, which act as recycling centers for the cell, must maintain an acidic pH in order to dispose of cellular waste. Similarly, structures called peroxisomes carry out chemical reactions called oxidation reactions and produce hydrogen peroxide, both of which would damage the cell if they weren’t safely stored away in their own “room.”
What are the key features of eukaryotic cells? Unlike prokaryotic cells, eukaryotic cells have:
1.A membrane-bound nucleus, a central cavity surrounded by membrane that houses the cell’s genetic material.
2.A number of membrane-bound organelles, compartments with specialized functions that float in the cytosol. (Organelle means “little organ,” and this name reflects that the organelles, like the organs of our body, have unique functions as part of a larger system.)
3.Multiple linear chromosomes, as opposed to the single circular chromosome of a prokaryote.
Eukaryotic cells are much more complicated than those of prokaryotes. They are packed with a fascinating array of subcellular structures that play important roles in energy balance, metabolism, and gene expression.
In the articles and videos that follow, we’ll take a tour through eukaryotic plant and animal cells, exploring the unique structures they contain and the role that each structure plays in the life of the cell.
Learn the key features of eukaryotic cells, such as nucleus, organelles, and linear chromosomes, and how they differ from prokaryotic cells. Explore the diagrams and examples of plant and animal cells, and join the conversation with other learners.
Learn the differences between prokaryotes and eukaryotes, including their genetic information, organelles, size, and organisms. Eukaryotes have a nucleus and can be unicellular or multicellular, while prokaryotes do not have a nucleus and are always unicellular.
- There are some cyanobacteria that form filaments with a differentiated cell type that fixes nitrogen and 'normal' photosynthesising cells. It's a f...
- A eukaryote is an organism with complex cells, or a single cell with a complex structures. In these cells the genetic material is organized into ch...
- No worries! We were all new to this at one time or another! To answer your question, yes, it doesn't need to be inside a membrane-bound nucleus in...
- I believe that the debate is continued, so we should still agree to the previous answer that prokaryotes CANNOT be multicellular. Bacteria might be...
- Biofilm Structure A microbial biofilm is made up of many prokaryotic organisms that combine to form a colony. The colony is adhered to a surface an...
- The answer really lies in whether or not the cells combine to form a multicellular mass or if they prefer living by themselves. Ones that form toge...
- It is not saying that a cell is multicellular. When it says eukaryotes can be multicellular it is referring to an organism made of eukaryotic cells.
- The cell wall is a sturdy structure that forms a protective envelope around the cell, and prevents physical damage.
Eukaryotes are organisms whose cells contain a nucleus and other membrane-bound organelles. Learn about the diversity, structure and function of eukaryotic cells and how they differ from prokaryotes.
6 nov. 2020 · A eukaryotic cell is a type of cell that contains a nucleus and other organelles. Learn the characteristics, structure, and cycle of eukaryotic cells and how they differ from prokaryotic cells.
