Bacteria reproduces by most commonly occurs by a kind of cell division called binary fission. Binary fission results in the formation of two bacterial cells that are genetically identical. 6. The Archaea these microbes are prokaryotes, meaning that they have no cell nucleus or any other membrane-bound organelles within their cells. 7.
Unit 4222-265 Causes and spread of infection (ICO2) Understand the causes of infection 1. The differences between bacteria, viruses, fungi and parasites Bacteria belong to a group of single celled microorganisms which are classified as prokaryotes i.e. they do not have membrane bound organelles. They have no true nucleus as the DNA is not contained within a membrane or separated from the rest of the cell, but is coiled up in a region of the cytoplasm called the nucleoid and the cell is surrounded by a cell wall an outer covering that protects the bacterial cell and gives it shape. Viruses are infectious agents, often highly host-specific, consisting of genetic material surrounded by a protein coat.
Bacteria are single-celled micro-organisms without a nucleus and a cellular membrane that is made up by protein-sugar molecules. They are a part of the prokaryote kingdom, which is a completely separate group. They are not animals and they are not plants, even though some of them actually show the process of photosynthesis and consequently produce their own nutrients. Most bacteria are between 1 and 10 micrometers long. Bacteria are by far the most common organisms in the world.
Chemolithotroph - An organism that obtains its energy from the oxidation of inorganic compounds. 3. Methanotroph – prokaryotes that are able to metabolize methane as their only source of Carbon and energy. 4. Primer - A short length of DNA or RNA used to initiate synthesis of a new DNA strand.
Prions are neither fungal nor viral and they contain no genetic material, but they have been held responsible for a number of degenerative brain diseases including CJD. The harmless and infectious forms of prion protein are nearly identical making it nearly impossible to tell the difference, but the infectious prion takes a folded shape compared to the normal protein. For many reasons still unknown this prion, when altered, can destroy nervous system tissues like the brain and the spinal cord. Creutzfeldt-Jakob disease and its variants belong to a broad group of human and animal diseases known as transmissible spongiform encephalopathies or TSEs. The name is derived from the spongy holes that are only visible under a microscope that develop in the affected brain tissue.
Outcome 1 Understand the cause of infection 1.Identify the difference between bacteria, viruses, fungi and parasites. Bacteria Bacteria is a single celled organism, bacteria have evolved to thrive in almost any environment and can be found in almost any substance/surface and also in the human body, only 1% of bacteria is actually harmful. It's bad or infectious bacteria that cause illness as they rapidly reproduce and produce a toxin that kills or mutates cells, bacteria is also self sufficient. Viruses A virus is a small capsule that contains DNA or RNA, viruses, unlike bacteria are not self sufficient and need a host in order to reproduce I.E a human body. When a virus enters the body, it enters some certain cells and takes over making the now host cell make the parts the virus needs to reproduce, the cells are eventually destroyed through this process.
When humans burn fossil fuels, most of the carbon quickly enters the atmosphere as carbon dioxide. Carbon dioxide is a greenhouse gas and traps heat in the atmosphere. Without it and other greenhouse gases, Earth would be a frozen world. But humans have burned so much
TASK 1 (P1) BACTERIA A) Labelled B) Bacteria is a single cell organism. They do not have a nucleus and are prokaryotic cells. Bacteria are simpler structures with no membrane bound organelles. A bacteria has a cell wall, plasma membrane, pilus, DNA, capsule and ribosomes. C) The average size of a bacteria is between the diameter of 0.5 to 5 µm.
Pollution from coal-fired power plants is released as fly ash, bottom ash and waste gases. Coal-fired power plants produce large quantities of sulfur dioxide and nitrogen oxides, the key pollutants in the formation of acid rain. Acid rain acidifies water bodies and harms forests and coastal ecosystems. Coal-fired power plant is the largest single source of atmospheric mercury emissions which is toxic to the developing brain, and exposure in the womb can cause health problems in children. Mercury released in the air gets into the waterways and is accumulated in fishes which are consumed by humans.
Cell! I don’t believe it is only four simple analphabetic letters! People call them the smallest and simplest living organisms. But, for me it is the most complex one because it is responsible for all structural and functional properties of a living organism, including me. So I wonder how this simple and smallest living organism can be this much capable to perform all this function.