This website uses cookies to ensure you have the best experience. Learn more

Eukaryotic Cells Essay

1860 words - 7 pages

Eukaryotic Cells
The cell may be regarded as the basic unit of an organism, it carries
out the essential processes that make the organism a living entity.
All cells share certain structural and functional features and they
are of almost universal occurrence in living organisms. Biologists
have devoted a great deal of attention to its structure and the
processes that go on inside it. They have recognised a major
distinction between two types of cells, Eukaryotic cells that have a
nucleus and Prokaryotic cells that do not have a nucleus. There are
many other differences between these two cells, in particular
eukaryotic cells have a full complement of membrane bound organelles
in their cytoplasm and are characterised by the possession of these
organelles. Eukaryotic cells are typical of a great majority of
organisms including all animal and plant cells and it is this type of
cell that we will be looking at. They are multicellular which means
they are composed of groups of specialised cells each performing a
particular function. They also show a high level of structural
complexity that allows an elaborate division of labour, which has
enabled them to reach high orders of functional complexity. The
biological membrane and the various molecular complexes embedded in
them must now be viewed as playing a central role in both cell
structure and its functions

All cells whether animal or plant has a cell surface that is known as
the plasma membrane. It is composed of a continuous double layer of
phospholipids within which protein molecules are embedded.
Phospholipids are polar molecules and are important in the formation
of the plasma membranes, the non polar hydrophilic tails attract each
other keeping the membrane relatively firm and in place. The formation
of the proteins and phospholipids is called the lipid bylayer. The
proteins take the form of globules dotted about in a mosaic pattern
with some being attached to the urface of the membrane while others
penetrate into it to varying extents. Some of these proteins act as
enzyme catalysing chemical reactions within the membrane and also as
pumps and channels transporting molecules into and out of the cell.
The plasma membrane is perforated by pores and allows substances to
pass in and out of the cell by Diffusion Active Transport, osmosis,
Endocytosis and Exocytosis. The external cell membrane contains
lipids and proteins combined with sugar molecules called Glycolipids
and Glycoproteins. The sugar molecules only attach to the outside of
the cell membrane and form what is known as the Glycocalyx or cell
coat. The Glycocalyx is sticky and enables animal cells to adhere to
each other. In the development of organisms cells must migrate from
one region to another and recognise what...

Find Another Essay On Eukaryotic Cells

Essay on Bacteria; Includes Bacteria, Eukaryotic Cells, Cell membrane, etc

604 words - 2 pages surface area/ to volume ratio is high, making it easier for substances to go in and out of the cell fast and efficiently. Smaller cells give the substance less space to travel in order to get to the nucleus, while the larger cells make it difficult for the substance to reach the nucleus because of its large distance from the nucleus and the cell surface. Therefore, smaller cells are more efficient than bigger cells.How Eukaryotic Cells Use

Develop some hypotheses explaining why only eukaryotic cells have evolved into multi-cellular organisms

974 words - 4 pages Prokaryotic cells are structurally simple. They are found only in single-celled and colonial organisms. Eukaryotic cells have organelles with their own membranes. Single-celled eukaryotic organisms are very diverse, but many colonial and multicellular forms also exist. The first of eukaryotic cells probably evolved or split off from Archeans, which have attributes of both prokaryotes (oxygen haters, e.g. bacteria), but also contain genes that

This is a science lesson plan on eukaryotic cells for all of you soon to be teachers. It is using The Madeline Hunter Model for lesson planning

514 words - 2 pages The Madeline Hunter ModelCells: The Basic Units of LifeObjectives1.Describe each part of a eukaryotic cell.2.Explain the function of each part of a eukaryotic cell.3.Describe the difference between animal cells and plant cells.Standards CoveredGeorgia Performance Standards (GPS)S7L2. Students will describe the structure and function of cells, tissues, organs, and organ systems.National StandardsLS1a.Living systems at all levels of organization

how was the development of specialised compartments in eukaryotic cells advantageous, and what problems needed to be overcome as a result?

820 words - 4 pages One of the biggest changes between prokaryotic and eukaryotic cells is the fact that instead of only one intracellular space they are now divided and has membrane bound organelles. Why would eukaryotic cells go through all the difficulty to become compartmentalised? It obviously must have held some advantages which outweighed the trouble. In this essay the advantages and resulting problems of specialised compartments in eukaryotic cells will be

The Story of Gene Expression in Eukaryotic Cells

738 words - 3 pages Gene expression can be described as the conversion of information from genes into messenger RNA by way of transcription. Transcription happens in the nucleus, and is where RNA copies of DNA are produced. This process is facilitated by RNA polymerase, where one RNA nucleotide is added to an RNA strand. RNA polymerase is an enzyme used to produce transcripted RNA. It is responsible for constructing RNA chains, in the process previously described

Prokaryotic Microbes

2196 words - 9 pages Introduction The purpose of this lab was to determine the size of prokaryotic microbes in comparison to eukaryotic cells. Students used oil immersion microscopy to magnify the microbes and compare their size to that of a eukaryotic cheek cell. The results of this lab allowed students to compare and contrast eukaryotic and prokaryotic cell size, which is a necessary skill when working with microbiology based labs. Microbiology is the study of

Prokaryotic Cells

1166 words - 5 pages Prokaryotic Cells All living things are made of cells, and cells are the smallest units that can be alive. Life on Earth is classified into five kingdoms, and they each have their own characteristic kind of cell. However the biggest division is between the cells of the prokaryote kingdom (monera, the bacteria) and those of the other four kingdoms (animals, plants, fungi and protoctista), which are all eukaryotic cells

Description and Analysis of the Cell Theory

1472 words - 6 pages out all the function necessary for the organism to live and reproduce. Prokaryotic cells are small than eukaryotic cells. Their sizes range from 0.00000787 to 0.007877 inches (Culen “Prokaryotic Cells”). Cells have similar shape, governed by cell wall, but differences between individuals do exist. The prokaryotic cells are mostly spherical or rod shaped, but they can be spiral, curved or irregular. The arrangement of the cells is also

cell parts

1386 words - 6 pages , which contain a nucleus, and prokaryotes, which do not. Prokaryotic cells are usually single-celled, while eukaryotic cells can be either or. Prokaryotic cells are simpler and smaller than eukaryotic cells, and don’t have membrane-bound organelles such as the nucleus. The DNA of a prokaryotic cell consists of a single chromosome that is in constant contact with cytoplasm. Enclosing the cell is the cell envelope which generally consists of a cell


1144 words - 5 pages Endosymbiosis Endosymbiosis is the theory that eukaryotic cells were formed when a prokaryotic cell ingested some aerobic bacteria. The first step of the evolution of a eukaryotic cell is the infolding of the cellular membrane. This process takes place when the plasma membrane folds inwards and develops an envelope around a smaller prokaryotic cell. Once the smaller cell is engulfed, it becomes dependent upon its host cell. It relies on

W3 Assignment 1 Discussion

888 words - 4 pages Eukaryotic cells are the most structurally advanced of the major cell types. Describe the structure and function of each of the eukaryotic organelles. Distinguish between those that are and are not membranous. Most are membranous. Eukaryotic cells, whether from animals, plants, protists, or fungi, are the most structurally advanced of the major cell types. Eukaryote are single-celled or multicellular organism whose cells contain nucleus and

Similar Essays

Cell Structures: Prokaryotic & Eukaryotic Cells

657 words - 3 pages conditions and chemical effects. It reduces the stress on the cells of the higher degree of temperature (Kaiser, 2007). These structures are very important, as they have a resistance capacity to the radiations, antibiotics, disinfectants, etc.The other category of the cells is ‘Eukaryotic cells’. These cells are classified into animal cells, plant cells, algae and fungi. Animal cells have several cell organelles. Out of these organelles

A Comparison Of Eukaryotic And Prokaryotic Cells

1506 words - 6 pages A Comparison of Eukaryotic and Prokaryotic Cells There are two main types of cells in the world. The simplest cells such as bacteria are known as Prokaryotic cells, and human cells are known as Eukaryotic cells. The main difference between each of these cells is that a eukaryotic cell has a nucleus and a membrane bound section in which the cell holds the main DNA which are building blocks of life. Prokaryotic cells do not have a nucleus

Comparison Of Prokaryotic And Eukaryotic Cells

3777 words - 15 pages Comparison of Plant and Animal Cells Introduction Eukaryotic cells are very complex; there are many organelles, each serving a distinct function, present in eukaryotic cells. We can divide the eukaryotic group of cells in to two main groups, according to the presence of these membrane bound organelles, and the structural differences amongst the cells and their organelles. The two groups of eukaryotic cells are plant and animal cells.Nucleus The

Eukaryotic Cells, All Organelles Explained With Functions

894 words - 4 pages Eukaryotic Cell vs. Prokaryotic EssayA eukaryotic plant cell consists of many organelles, a cell wall, and a nucleus. Unlike an animal cell, plant cells have cell walls that allow them to bind to other plant cells, hold their structure, and prevent excessive water intake. Young plant cells have a primary cell wall, which is thin and fairly flexible. Between the primary cell walls is the middle lamella, which sticks the cell walls together. As