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What are the difference in the flagella in prokaryotic and eucarkaryotic?
Eukaryotic flagella are quite different in structure and function to prokaryotic flagella.Bacterial flagella (as opposed to archaeal flagella - go to http://en.wikipedia.org/wiki/Flagellum#Archaeal to investigate differences between bacterial and archaeal flagella) are composed of the protein flagellin, which is coiled around into a stiff filament. Movement of a bacterial cell is generated by rotation of the filament, a bit how like a propellor works. Reversing direction of rotation can change direction of movement.In eukaryotic flagella, the structure is more complex. The base of the eukaryotic flagella houses the foundation of the structure. Nine microtubule groups, each consisting of three microtubules, form the base of the flagella. Further away from the cell, the flagella is made up of two microtubule's connected by a bridge. Radial spokes branch out to nine pairs of microtubules that form a circle around a flagella transverse section (if you chop it in half and look at the exposed inside).A eukaryotic flagella moves its cell by sliding adjacent pairs of microtubules, which causes the flagella to bend. This bending creates movement. To see a good example, watch this video: http://www.britannica.com/EBchecked/topic-video/209243/16501/Movement-of-eukaryotic-flagella-in-real-time-and-slow-motion
How do bacterial cells differ from other cells?
Do not contain a nucleus or some other organelles.
Why dont eukaryotic cells have a cell wall?
Around half of the eukaryotes have a cell wall. They are plant cells. That half that doesn't have cell walls, animal cells, don't have them because they make the cells too stiff. If our cells had cell walls, we would be unable to move.
How many ways can eukaryotic cells replicate?
Eukaryotic cells can replicate through either mitosis or meiosis. Mitosis is a form of cell division that produces two daughter cells with the same number of chromosomes as the parent cell. Meiosis is a specialized form of cell division that produces gametes (sperm and egg cells) with half the number of chromosomes as the parent cell.
How do bacteria cells differ from the cells of eukaryotes?
Prokaryotic Cells: 1)Unicellular 2)No Nucleus 3)DNA circular 4)Reproduction is asexul Eukaryotic Cells: 1) Multicellular 2) Nucleus 3) DNA is linear 4) Cell division is by mitosis or meiosis
What is it called when cells are copied with half the number of chromosomes?
It is called meiosis. During meiosis, cells undergo two rounds of division resulting in cells with half the number of chromosomes as the original cell. This process is important for sexual reproduction in eukaryotic organisms.
How do eukaryotic cells divide by binary fission?
Binary fission, or prokaryotic fission, is the form of asexual reproduction and cell division used by all prokaryotes, some protozoa, and some organelles within eukaryotic organisms. This process results in the reproduction of a living prokaryotic cell by division into two parts which each have the potential to grow to the size of the original cell. Mitosis and cytokinesis are not the same as binary fission; specifically, binary fission cannot be divided into prophase, metaphase, anaphase, and telophase because prokaryotes have no nucleus and no centromeres. The ability of some multicellular animals, such as echinoderms and flatworms, to regenerate two whole organisms after having been cut in half, is also not the same as binary fission. Neither is vegetative reproduction of plants. Binary fission begins with DNA replication. DNA replication starts from an origin of replication, which opens up into a replication bubble (note: prokaryotic DNA replication usually has only 1 origin of replication, whereas eukaryotes have multiple origins of replication). The replication bubble separates the DNA double strand, each strand acts as template for synthesis of a daughter strand by semiconservative replication, until the entire prokaryotic DNA is duplicated. After this replicational process, cell growth occurs. Each circular DNA strand then attaches to the cell membrane. The cell elongates, causing the two chromosomes to separate. Cell division in bacteria is controlled by the FtsZ, a collection of about a dozen proteins that collect around the site of division. There, they direct assembly of the division septum. The cell wall and plasma membrane starts growing transversely from near the middle of the dividing cell. This separates the parent cell into two nearly equal daughter cells, each having a nuclear body.[1] The cell membrane then invaginates (grows inwards) and splits the cell into two daughter cells, separated by a newly grown cell plate. Use by eukaryotic organelles Eukaryotic organelles such as mitochondria, chloroplasts, and peroxisomes also reproduce within the eukaryotic cell by binary fission. How they are allotted to one descendant cell or the other during mitosis and cytokinesis is not yet clear
What is the name givin to cell devision in eukaryotes?
The process of cell division in eukaryotes is called mitosis when it refers to the division of somatic cells, resulting in two genetically identical daughter cells. In addition, eukaryotic cells also undergo meiosis, which is a specialized type of division that produces gametes (sperm and eggs) with half the number of chromosomes. Both processes are essential for growth, development, and reproduction in eukaryotic organisms.
What is it called when one cell reproduces by dividing in half to become two cells?
The process in which one cell reproduces by dividing in half to form two cells is called binary fission. This method of asexual reproduction is commonly seen in prokaryotic organisms, such as bacteria. During binary fission, the DNA of the cell is duplicated, and the cell splits into two genetically identical daughter cells.
Cells that do not have pairs of chromosomes?
Gametes (sex celles) such as egg and sperm only contain one set of chromosomes this is is called a hapliod nucleus. when the 2 meet this forms a full pair of chromosomes and makes a dapliod nucleus.
Why are bacteria cells different from living organisms?
Bacteria are living organisms, but they have some differences from eukaryotic organisms like plants and animals. Bacteria are prokaryotic, meaning they lack a nucleus and membrane-bound organelles. They also have a simpler structure and are usually single-celled.
How prokaryotes chromosomes differ from eukaryote?
A prokaryotic chromosome consists of a single molecule of DNA in the form of a closed loop. The chromosome is described as circular. A prokaryotic cell has only one chromosome. A eukaryotic chromosome is linear, not circular, in other words it has two ends, like a sausage. Each chromosome contains one molecule of DNA for the first half or so of interphase, then the DNA replicates, and the two DNA molecules remain together (as sister-chromatids) in the same chromosome for the rest of interphase. This does not happen in prokaryotic cells. Eukaryotic cells have more than onechromosome. A further difference: prokaryotic chromosomes consist only of a naked DNA molecule, but eukaryotic chromosomes also contain many molecules of proteins (mostly histones). The DNA is wound around these proteins.
