Preview

The Eukaryotic Cell

Better Essays
Open Document
Open Document
1212 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
The Eukaryotic Cell
W2: Assignment 2
Lisa Majdecki
South University Online

THE ORGANELLES OF EUKARYOTIC CELLS

. The difference between Prokaryotic and Eukaryotic Cells is organelles, membrane enclosed structures that perform specific duties. The most important of all is the “nucleus,” this holds the DNA and is surrounded by a double membrane. The Prokaryotic lacks a nucleus which is not partitioned from the other cells by membranes. The region between the nucleus and plasma membrane is called cytoplasm and in the Eukaryotic cell it consists of various organelles suspended in liquid cytosol. The most significant structural difference is that only eukaryotic cells have organelles (“little organs”), membrane-enclosed structures that perform specific functions. The most important organelle is the nucleus, which houses most of a eukaryotic cell’s DNA and is surrounded by a double membrane. A prokaryotic cell lacks a nucleus; its DNA is coiled into a “nucleus-like” region called the nucleoid, which is not partitioned from the rest of the cell by membranes. (Pg.58, p1)
THE PLASMA MEMBRANE Like all other cellular membranes, the plasma membrane consists of both lipids and proteins. The fundamental structure of the membrane is the phospholipid bilayer, which forms a stable barrier between two aqueous compartments. In the case of the plasma membrane, these compartments are the inside and the outside of the cell. Proteins embedded within the phospholipid bilayer carry out the specific functions of the plasma membrane, including selective transport of molecules and cell-cell recognition. Mitochondrion is the power house of cell that aids in producing energy for the cellular metabolism. MITOCHONDRIA IS PRESENT IN BOTH PLANTS AND ANIMAL CELLS.

They are related to dietary fats but have only two fatty acid tails instead of three. In place of the third fatty acid a phospholipid, has a combination of phosphorous and oxygen. The phosphate group makes



References: Simon, Reece, Dickey, E. (2012). Campbell Essential Biology with Physiology (4th ed). Pearson Learning Solutions. Retrieved from http://digitalbookshelf.southuniversity.edu/books/9781256902089/id/ch04fig4 http://micro.magnet.fsu.edu/cells/golgi/golgiapparatus.html http://answers.yahoo.com/search/search_result?type=2button&p=%20Describe%20the%20structure%20and%20function%20of%20each%20of%20the%20eukaryotic%20organelles

You May Also Find These Documents Helpful

  • Good Essays

    An important difference between Prokaryotic and Eukaryotic cells is the location of their DNA. In a Eukaryotic cell, most of the DNA is found in the Nucleus. The Nucleus contains three distinct parts, the Nuclear envelope, the Nucleolus, and Chromatin. The Nuclear envelope is a double membrane. Also pore complexes connect the nucleus to the Endoplasmic Reticulum. The Nucleolus doesn’t have a membrane structure. It serves in the production of ribosomes. Lastly, Chromatin is material consisting of DNA and proteins. In a Prokaryotic cell, the DNA is concentrated in the Nucleoid. The Nucleoid is also not membrane-enclosed.…

    • 369 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Cells are the basic functional units of all organisms. Cells are the smallest unit of life and are often called the "building blocks of life". The distinction between prokaryotes and eukaryotes is considered to be the most important variation among groups of organisms. Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. The differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts, the cell wall, and the structure of chromosomal DNA. In this lab four cells were observed and they were Onion Epidermis Cell stained with Iodine, Elodea Freshwater Plant Cell, Epithelial Cells aka Human Cheek cells stained with Crystal Violet, and Unknown Cell. The difference between animal and plants cells is that animal cells does not have a cell wall or chloroplasts but plant cells do. Animal cells are round and irregular in shape while plant cells have fixed, rectangular shapes. Plant cells contains a large and central vacuoles while animal cells contains small and fewer vacuoles.…

    • 843 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Vlab Report

    • 2124 Words
    • 9 Pages

    Prokaryotic don’t have a nucleus and their cell type is unicellular. They do not have a true membrane bound nucleus and they have loop DNA. They are rod shaped, spherical and spiral and they divide by binary fission. They are smaller in size as well.…

    • 2124 Words
    • 9 Pages
    Good Essays
  • Good Essays

    Nucleoid Region: The region in a prokaryotic cell consisting of a concentrated mass of DNA. (The “nucleus” of a prokaryotic cell) The nucleoid instructs all the organelles on what to do.…

    • 669 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Nucleus - The nucleus can be found in animal and plant cells. This is the brain of the cell so to speak. This is where chromosomes containing the DNA (genetic) information are located.…

    • 261 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Worksheet 2

    • 797 Words
    • 4 Pages

    2. a) What is a difference between prokaryotic and eukaryotic cells? b) What is one significant similarity? Prokaryotic cells do not have a neucleus and Eukaryotic cells do have a nucleus. One similarity is that both are covered by a cell membrane and contain RNA as well as require energy…

    • 797 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Prokaryotes refer to organisms with a cell nucleus or organelles that are membrane-bound. Some prokaryotes are multicellular while others are unicellular. Eukaryotes, on the other hand, refer to organisms whose cytoskeleton and internal membranes organize them into complex structures.…

    • 298 Words
    • 2 Pages
    Good Essays
  • Better Essays

    Prokaryotic cells- DNA is not separated from the rest of the cell in a nucleus, prokaryotic cells lack the cytoplasm organelles typical of eukaryotic cells. Almost all prokaryotic cells have tough external walls.…

    • 3353 Words
    • 14 Pages
    Better Essays
  • Good Essays

    The phospholipid bilayer has important roles in the plasma membrane, such as allowing lipid-soluble substances to enter and leave the cell via diffusion and to stop water soluble substances from entering and leaving the cell. This is also what makes the membrane flexible.…

    • 1094 Words
    • 5 Pages
    Good Essays
  • Good Essays

    This is a diagram of a prokaryote cell and it shows that they are not very complex cells. They do not contain any membrane bound organelles and they have relatively small ribosomes. They also do not contain and endoplasmic reticulum.1 The DNA is not stored in a nucleus but it is stored in the nucleoid. DNA in the cytoplasm and many prokaryotic cells also contain very small loops of DNA called plasmids. The nucleoid region is the area of the cytoplasm, which contains the single bacterial DNA molecule. Some prokaryotic cells have a capsule, which is an outer layer of protection which protects the cell when being engulfed by other organisms. It also helps the cell stick to surfaces and nutrients. The cell wall (which contains murein) protects and gives the cell shape. In the centre of the cell there is the cytoplasm which is composed mainly of water but also contains digestive enzymes, salts, organelles and other organic molecules. The prokaryotic cell also has a cell or plasma membrane which controls the movement of substances in and out of the cell. The pili are short, hair-like structures which attach the cell to other bacterial cells. Finally, the bacterial flagellum is a long ‘tail’ which helps the cell move.2…

    • 1203 Words
    • 5 Pages
    Good Essays
  • Good Essays

    There are two different types of cells, there are prokaryotes and eukaryotes. Within eukaryotes there are different structures and similar structures. For example; in a plant cell they have a nucleus, mitochondria an ER, and a Golgi body. These are the same as animal cells; however they differ because plants cells have a cellulose cell wall, chloroplasts, large central vacuole and they use starch for storage whereas an animal cell has lysosomes, rough ER, smooth ER and ribosomes. Eukaryotes differ from prokaryotes because prokaryotes have no nucleus, they just have a loop of DNA and they also have no membrane-bound organelles. Prokaryotes also have a cell wall, along with a slime capsule, flagellae and plasmids.…

    • 768 Words
    • 2 Pages
    Good Essays
  • Good Essays

    The nucleus is the most obvious organelle in a eukaryotic cell. Virtually all eukaryote cells have a nucleus (red blood cells lose theirs and so are enucleate for most of their life-span of 180 days). It is surrounded by the nuclear envelope, a double membrane with contains a large number of pores. Molecules enter and leave the nucleus by these pores. The two lipid bilayers of the double membrane are separated by a gap of 20 to 40 nm, called the perinuclear space.…

    • 668 Words
    • 2 Pages
    Good Essays
  • Good Essays

    The distinction between prokaryotes and eukaryotes is considered to be the most important distinction among groups of organisms. Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. Differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts, the cell wall, and the structure of chromosomal DNA.…

    • 394 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Biology Chapter 9

    • 2355 Words
    • 10 Pages

    E) The lack of organelles in prokaryotes means that the basic cellular functions are different in prokaryotes than in eukaryotes.…

    • 2355 Words
    • 10 Pages
    Good Essays
  • Better Essays

    The eukaryotic structure consists of the following organelle which includes mitochondria, chloroplast, the endoplasmic reticulum, the Golgi apparatus, lysosomes and nucleus. These organelles perform a specific function that help the cell survive. The organelles are separated from the rest of the cellular space by a membrane; it is like having a separated room in a home. The nucleus is the most critical part of the eukaryotic cell. The nucleus house most of the eukaryotic cell’s DNA and is surrounded by a double membrane. A prokaryotic cell lack a nucleus it DNA is coiled into a nucleus-like region called the nucleoid, which is not partitioned from the rest of the cell by membrane (, Campbell Essential Biology 2012).…

    • 853 Words
    • 4 Pages
    Better Essays