Biology 1
... 1. Pili : only found in gram negative bacteria, tubular , hairlike structures of protein larger and more rare than fimbriae. 2. fimbriae :Adhesion to cells and surfaces, Responsible for biofilms. 3. Flagella: bacteria may have one, a few, or many flagella in different positions on the cell. B .Cell ...
... 1. Pili : only found in gram negative bacteria, tubular , hairlike structures of protein larger and more rare than fimbriae. 2. fimbriae :Adhesion to cells and surfaces, Responsible for biofilms. 3. Flagella: bacteria may have one, a few, or many flagella in different positions on the cell. B .Cell ...
- SlideBoom
... - these stain blue in color Gram - more complex cell walls with less peptidoglycan - Outer lipopolysaccharide-containing membrane that covers the cell wall - these stain pink in color ...
... - these stain blue in color Gram - more complex cell walls with less peptidoglycan - Outer lipopolysaccharide-containing membrane that covers the cell wall - these stain pink in color ...
Abstract
... On the Evolution of Selenium Respiring Bacteria Respiratory flexibility allows microorganisms to thrive in geologic environments. The ability of anaerobic prokaryotes to employ different terminal electron acceptors for respiration permits these organisms to colonize and populate ecological niches in ...
... On the Evolution of Selenium Respiring Bacteria Respiratory flexibility allows microorganisms to thrive in geologic environments. The ability of anaerobic prokaryotes to employ different terminal electron acceptors for respiration permits these organisms to colonize and populate ecological niches in ...
Chapter 28 PowerPoint
... 1 µm 1.37 µm Archaea differ greatly from bacteria. Although both are prokaryotes, archaeal cell walls lack peptidoglycan; plasma membranes are made of different kinds of lipids than bacterial plasma membranes; RNA and ribosomal proteins are more like eukaryotes than bacteria. Mostly anaerobic. Examp ...
... 1 µm 1.37 µm Archaea differ greatly from bacteria. Although both are prokaryotes, archaeal cell walls lack peptidoglycan; plasma membranes are made of different kinds of lipids than bacterial plasma membranes; RNA and ribosomal proteins are more like eukaryotes than bacteria. Mostly anaerobic. Examp ...
Bacteria
... Bacteria Characteristics of Bacteria • Single-celled prokaryotic organisms • Most smaller than 10 micrometers • Contain cell walls of a protein and carbohydrate matrix called peptidoglycan • Structurally different from Archaea or plants • Do not contain a nucleus or membrane-bound organelles • Nucle ...
... Bacteria Characteristics of Bacteria • Single-celled prokaryotic organisms • Most smaller than 10 micrometers • Contain cell walls of a protein and carbohydrate matrix called peptidoglycan • Structurally different from Archaea or plants • Do not contain a nucleus or membrane-bound organelles • Nucle ...
The Lyme Bacterium (Borrelia burgdorferi)
... scientific study found an average of 2,735 bacteria/tick 15 days after the tick had fed. Although the scientists found that recently molted nymphs had only 300 bacteria/nymph, within 75 days, these nymphs had an average of 61,275 bacteria! The tick serves as the vector for the bacteria, moving it fr ...
... scientific study found an average of 2,735 bacteria/tick 15 days after the tick had fed. Although the scientists found that recently molted nymphs had only 300 bacteria/nymph, within 75 days, these nymphs had an average of 61,275 bacteria! The tick serves as the vector for the bacteria, moving it fr ...
Prokaryotes represent a broad group of organisms that for many
... them to glide through soil. Under certain conditions of stress they can form a "fruiting" body, which may be brightly colored and as large as a millimeter in diameter. The fruiting body releases spores that will become active in favorable environments. Another proteobacterim includes bdellovibrios. ...
... them to glide through soil. Under certain conditions of stress they can form a "fruiting" body, which may be brightly colored and as large as a millimeter in diameter. The fruiting body releases spores that will become active in favorable environments. Another proteobacterim includes bdellovibrios. ...
Ch 27 Lecture
... Parts of the Spore 1. Core - The core is dehydrated cytoplasm containing DNA, ribosomes, enzymes etc. Everything that is needed to function once returned to the vegetative state. 2. Cortex - The cortex is a modified cell wall/peptidoglycan layer that is not as cross-linked as in a vegetative cell. ...
... Parts of the Spore 1. Core - The core is dehydrated cytoplasm containing DNA, ribosomes, enzymes etc. Everything that is needed to function once returned to the vegetative state. 2. Cortex - The cortex is a modified cell wall/peptidoglycan layer that is not as cross-linked as in a vegetative cell. ...
Chapter 28 - Dr. Jennifer Capers
... • Oldest, structurally simplest, and most abundant forms of life • Abundant for over a billion years before eukaryotes • 90 and 99% unknown and undescribed • Fall into 2 domains – Bacteria (also called Eubacteria) – Archaea (formerly called Archaebacteria) • Many archaeans are extremophiles ...
... • Oldest, structurally simplest, and most abundant forms of life • Abundant for over a billion years before eukaryotes • 90 and 99% unknown and undescribed • Fall into 2 domains – Bacteria (also called Eubacteria) – Archaea (formerly called Archaebacteria) • Many archaeans are extremophiles ...
TB Diagnosis fact sheet - The Tuberculosis Association of India
... known to be related to drug resistance, and provide accurate results within 24 hours. But since not all such mutations are currently known, it doesn’t give as reliable results as more conventional means. Several methods of rapidly detecting the growth of TB bacteria have been developed. The basic pr ...
... known to be related to drug resistance, and provide accurate results within 24 hours. But since not all such mutations are currently known, it doesn’t give as reliable results as more conventional means. Several methods of rapidly detecting the growth of TB bacteria have been developed. The basic pr ...
Document
... A. General characteristics – 1. unicellular 2. prokaryotes – lack a nucleus and most organelles 3. made of two different domains, Bacteria and Archaea 4. first life forms to appear on earth, 3.8 billion years ago 5. most numerous of all organisms on earth, and live in every environment 6. bacteria c ...
... A. General characteristics – 1. unicellular 2. prokaryotes – lack a nucleus and most organelles 3. made of two different domains, Bacteria and Archaea 4. first life forms to appear on earth, 3.8 billion years ago 5. most numerous of all organisms on earth, and live in every environment 6. bacteria c ...
PROSES PRODUKSI BIOINDUSTRI (PROSES FERMENTASI)
... They can be motile or non-motile Cytoplasmic materials are enclosed in a rigid wall on the surface and a membrane beneath the wall, and they are immobile. The membrane contains energy generating components. The genetic materials (structural and plasmid DNA) are circular, not enclosed in nuclear memb ...
... They can be motile or non-motile Cytoplasmic materials are enclosed in a rigid wall on the surface and a membrane beneath the wall, and they are immobile. The membrane contains energy generating components. The genetic materials (structural and plasmid DNA) are circular, not enclosed in nuclear memb ...
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
... II. State whether the following statements are true or false: ...
... II. State whether the following statements are true or false: ...
A.1.2.1AntibioticTherapy
... Penicillins (also called β-Lactam antibiotics) Tetracyclines Fluoroquinolones Sulfa antibiotics (Sulfonamids) ...
... Penicillins (also called β-Lactam antibiotics) Tetracyclines Fluoroquinolones Sulfa antibiotics (Sulfonamids) ...
Fig. 1. Common shapes of bacteria Fig. 2: Different arrangements of
... Gram stain is lost due to thinnes of cell wall and abundance of lipo-proteins and lipopolyaccharides ...
... Gram stain is lost due to thinnes of cell wall and abundance of lipo-proteins and lipopolyaccharides ...
Document
... Heterotrophs- obtain energy by consuming organic compounds – parasites- get energy from living organisms – saprobes (saprophytes)- get energy from dead, decaying matter; also called decomposers ...
... Heterotrophs- obtain energy by consuming organic compounds – parasites- get energy from living organisms – saprobes (saprophytes)- get energy from dead, decaying matter; also called decomposers ...
Document
... Heterotrophs- obtain energy by consuming organic compounds – parasites- get energy from living organisms – saprobes (saprophytes)- get energy from dead, decaying matter; also called decomposers ...
... Heterotrophs- obtain energy by consuming organic compounds – parasites- get energy from living organisms – saprobes (saprophytes)- get energy from dead, decaying matter; also called decomposers ...
Bacteria Webquest - Nutley Public Schools
... Please visit the following website: http://www.ucmp.berkeley.edu/bacteria/bacterialh.html 12. What are pathogenic bacteria? 13. What do aerobic bacteria require? 14. Where do anaerobic bacteria live and what can they cause? 15. How do facultative anaerobic bacteria differ from the other two? 16. Wha ...
... Please visit the following website: http://www.ucmp.berkeley.edu/bacteria/bacterialh.html 12. What are pathogenic bacteria? 13. What do aerobic bacteria require? 14. Where do anaerobic bacteria live and what can they cause? 15. How do facultative anaerobic bacteria differ from the other two? 16. Wha ...
When the rate of change depends upon the amount present we get
... a. Find an expression for the number of bacteria in t hours. b. What is the relative growth rate? c. Find the number of bacteria after 3 hours. d. Find the rate of growth after 3 hours. e. When will the population reach 10,000? ...
... a. Find an expression for the number of bacteria in t hours. b. What is the relative growth rate? c. Find the number of bacteria after 3 hours. d. Find the rate of growth after 3 hours. e. When will the population reach 10,000? ...
Lecture 02, origins and prokaryotes - Cal State LA
... - Fungi (penicillins) - Soil bacteria of genus Streptomyces (erythromycin, streptomycin, ...
... - Fungi (penicillins) - Soil bacteria of genus Streptomyces (erythromycin, streptomycin, ...
What type of cell is found in Bacteria and Archaea?
... conjugation? How many bacteria does conjugation start with and how many does conjugation end with? More than one cell may be created – part or all of the genetic material is transferred to a cell the cell then divides by binary fission creating more cells ...
... conjugation? How many bacteria does conjugation start with and how many does conjugation end with? More than one cell may be created – part or all of the genetic material is transferred to a cell the cell then divides by binary fission creating more cells ...
Chlamydia pneumoniae
... Woese, C.R. 2002. On the evolution of cells. Proc Natl Acad Sci USA 99(13):8742-7. Woese, C.R. 2000. Interpreting the universal phylogenetic tree. Proc Natl Acad Sci USA 97(15):8392-6. ...
... Woese, C.R. 2002. On the evolution of cells. Proc Natl Acad Sci USA 99(13):8742-7. Woese, C.R. 2000. Interpreting the universal phylogenetic tree. Proc Natl Acad Sci USA 97(15):8392-6. ...
Bacteria
Bacteria (/bækˈtɪəriə/; singular: bacterium) constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep portions of Earth's crust. Bacteria also live in symbiotic and parasitic relationships with plants and animals. They are also known to have flourished in manned spacecraft.There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water. There are approximately 5×1030 bacteria on Earth, forming a biomass which exceeds that of all plants and animals. Bacteria are vital in recycling nutrients, with many of the stages in nutrient cycles dependent on these organisms, such as the fixation of nitrogen from the atmosphere and putrefaction. In the biological communities surrounding hydrothermal vents and cold seeps, bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane, to energy. On 17 March 2013, researchers reported data that suggested bacterial life forms thrive in the Mariana Trench, which with a depth of up to 11 kilometres is the deepest part of the Earth's oceans. Other researchers reported related studies that microbes thrive inside rocks up to 580 metres below the sea floor under 2.6 kilometres of ocean off the coast of the northwestern United States. According to one of the researchers, ""You can find microbes everywhere — they're extremely adaptable to conditions, and survive wherever they are.""Most bacteria have not been characterized, and only about half of the phyla of bacteria have species that can be grown in the laboratory. The study of bacteria is known as bacteriology, a branch of microbiology.There are approximately ten times as many bacterial cells in the human flora as there are human cells in the body, with the largest number of the human flora being in the gut flora, and a large number on the skin. The vast majority of the bacteria in the body are rendered harmless by the protective effects of the immune system, and some are beneficial. However, several species of bacteria are pathogenic and cause infectious diseases, including cholera, syphilis, anthrax, leprosy, and bubonic plague. The most common fatal bacterial diseases are respiratory infections, with tuberculosis alone killing about 2 million people per year, mostly in sub-Saharan Africa. In developed countries, antibiotics are used to treat bacterial infections and are also used in farming, making antibiotic resistance a growing problem. In industry, bacteria are important in sewage treatment and the breakdown of oil spills, the production of cheese and yogurt through fermentation, and the recovery of gold, palladium, copper and other metals in the mining sector, as well as in biotechnology, and the manufacture of antibiotics and other chemicals.Once regarded as plants constituting the class Schizomycetes, bacteria are now classified as prokaryotes. Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Although the term bacteria traditionally included all prokaryotes, the scientific classification changed after the discovery in the 1990s that prokaryotes consist of two very different groups of organisms that evolved from an ancient common ancestor. These evolutionary domains are called Bacteria and Archaea.