Biotech

Describe and distinguish the twain domains of Prokaryotes Introduction * Prokaryotes include the domains bacterium and Archaea. * Prokaryotes argon single- carrelled organisms. They atomic number 18 the smallest, simplest organisms. They atomic number 18 abundant in the air, water, soil, and on close objects. Prokaryotes have a single circular chromosome that may be 500 times the length of the cell. It is attached to the within of the blood germ plasm membrane. The chromosome lacks the associated proteins found in eukaryotes. It consists of only deoxyribonucleic acid. Binary Fission * Prokaryotes reproduce up by binary fission. * Binary fission differs from mitosis in that a spindle is not utilized. The cell does not go through the stages of mitosis. * The spindle apparatus evolved later in eukaryotes. * During cell division, the desoxyribonucleic acid replicates. The replicating DNA molecules attach to the plasma membr ane. As the cell elongates, the chromosomes atomic number 18 pulled apart. * When cell is approximately twice its original length, the plasma membrane grows inward and a cell wall forms surrounded by the two cells. * Two more chromosomes may start to give way originally the first two be separated from distributively other. Endospores * around bacteria form endospores when environmental conditions become unfavorable. * Endospores are DNA and a portion of cytoplasm encased in a tough cell wall. They are resistant to extremes in temperature, drying, and tart chemicals. Organic Food * Living organisms require organic compounds for provender. Organic refers to molecules that hold in carbon and hydrogen. Examples of organic nutrients are carbohydrates (sugars, starches), lipids, and proteins. * Autotrophs are organisms that make their sustain organic food. Heterotrophs consume food that is already present in the environment. For example, plants a re autotrophs because they make their exper! ience food by photosynthesis. Animals are heterotrophs because they obtain their food by eating it. Autotrophic Prokaryotes * There...If you lack to get a wide-cut essay, order it on our website: OrderCustomPaper.com

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