The Bacterial DNA is arranged in a single, closed loop. The CYTOPLASM of Bacterial cells is made of a Viscous (Thick Liquid) solution of Ribosomes and DNA.Ħ. Bacterial cells do NOT have membrane bound organelles. The cell membranes of Photosynthetic Bacteria have internal foldings called THYLAKOIDS, these are equal to the Thylakoids found in Chloroplasts.ĥ. Bacteria do NOT have Mitochondria so they use their cell membranes to carry out Cellular Respiration.Ĥ. In Bacteria, the cell membrane contains Enzymes that Perform the Reactions of Cellular Respiration.ģ. The Bacterial Cell Membrane is composed of a Lipid Bilayer similar to Eukaryotes.Ģ. With few exceptions bacteria have a Cell Wall. The Variety of Structures among Bacteria is due to adaptations to individual niches (place in the world). Some bacteria have Distinctive Structures, such as Endospores, Capsules, and Outer Membranes.ģ. Bacteria are Typically composed of a Cell Wall, a Cell Membrane, and Cytoplasm. These detailed structures are responsible for the activities carried out by bacteria. However, the electron microscope reveals a great amount of detail structure within each form. Viewed through a light microscope, bacteria appear to be relatively simple rods, spheres, and other forms. SPIRAL-SHAPED EUBACTERIA ARE CALLED SPIRILLA.īACTERIA USUALLY GAIN PART OF THEIR NAME FROM THEIR SHAPE. Electron micrograph of an ultra-thin section of a chain of group A streptococci:ĭ. ![]() ![]() WHEN COCCI OCCURE IN CHAINS, THEY ARE CALLED STREPTOCOCCI, GRAPELIKE CLUSTERS OF COCCI ARE CALLED STAPHYLOCOCCI.Ĭ. SPHERE-SHAPED Eubacteria are called COCCI. Eubacteria that are ROD-SHAPED are called BACILLIī. These spherical, rod and sprial shaped morphologies are typical of such genera as: Streptococcus / Staphylococcus, Escherichia / Bacillus and Leptospira / Spirillum.Ī. Bacteria can be one of THREE Different SHAPES: the three common types of bacterial morphology – coccus, bacillus, spirillum. The so-called true bacteria are all the organisms traditionally known as BACTERIA OR AS MOM WOULD SAY “GERMS”.ģ. Eubacteria account for most bacteria they occur in many shapes and sizes and have distinct Biochemical and Genetic Characteristics.Ģ. MOST PROKARYOTES ARE SINGLE-CELLED ORGANISMS (UNICELLULAR).ġ. ALMOST ALL PROKARYOTES ARE SMALLER THAN THE SMALLEST EUKAROYTES.Į. PROKARYOTES HAVE RIBOSOMES THAT ARE DIFFERENT FROM THOSE OF EUKARYOTES.ĭ. PROKAROYTES DO HAVE A CELL MEMBRANE, BUT DO NOT HAVE MEMBRANE BOUND ORGANELLES.Ĭ. PROKARYOTES DO NOT HAVE A MEMBRANE-BOUND NUCLEUS.ī. PROKARYOTES SHARE SEVERAL CHARACTERISTICS:Ī. Traditionally, bacteria have been grouped based on their Structure, Physiology, Molecular Composition, and Reaction to specific types of stains, (Gram Stain), rather than on their evolutionary relationships.Ĩ. Unlike most other organisms, Bacteria have few Morphological differences that can be used to classify them, Bacteria do Not vary in size and shape to the extent that other types of organisms do.ħ. Organisms are classified as Bacteria by ONE CHARACTERISTIC: THE LACK OF A CELL NUCLEUS.Ħ. ![]() Evidence in the fossil record indicates that Prokaryotes are about 2.5 Billion Years Old and Modern Humans arose about 100,000 years ago.ĥ. They have been found at the bottom of the oceanic trenches 9.6 km (6 mi) below the water’s surface and in Arctic and Antarctic Regions.Ĥ. ![]() Bacteria have evolved into many different forms, and they are now part of nearly every environment on Earth. Bacteria are the MOST NUMEROUS ORGANISMS ON EARTH.ģ. BACTERIA are microscopic unicellular Prokaryotes.Ģ. BATCH PROCESSING AND CONTINUOUS FLOW PROCESSINGġ.Bacteria are present in the human digestive system and aid in digestion.PICTURES OF SOME COMMON DISEASE CAUSING BACTERIA:.FACTORS THAT AFFECT THE GROWTH OF BACTERIA.STRUCTURAL CHARACTERISTICS OF A BACTERIAL CELL.
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