Types of Agar
... between organisms that ferment lactose (e.g., E. coli) and those that do not (e.g., Salmonella, Shigella). • Organisms that ferment lactose display "nucleated colonies" -- colonies with dark centers. ...
... between organisms that ferment lactose (e.g., E. coli) and those that do not (e.g., Salmonella, Shigella). • Organisms that ferment lactose display "nucleated colonies" -- colonies with dark centers. ...
Introduction to Biochemical tests
... a. inducible : produced only when needed or induced. b. constitutive : produced continuously ...
... a. inducible : produced only when needed or induced. b. constitutive : produced continuously ...
Nitrogen Cycle - Cremona School
... • Nitrogen cycle: cycling of nitrogen between organisms and environment. • Nitrogen fixation: process of converting nitrogen gas into nitrates and ammonium ions. – Nitrogen-fixing bacteria: bacteria grow in root nodules of legumes. – Examples are: clover, alfalfa – This can then be used by plants. ...
... • Nitrogen cycle: cycling of nitrogen between organisms and environment. • Nitrogen fixation: process of converting nitrogen gas into nitrates and ammonium ions. – Nitrogen-fixing bacteria: bacteria grow in root nodules of legumes. – Examples are: clover, alfalfa – This can then be used by plants. ...
Mutations of Bacteria From Virus Sensitivity to Virus Resistance
... • Adaptation hypothesis: each resistant occurs as a separate, random event. No clones of resistants before the attack. Poisson distribution of survivors • Mutation – grows of clones of resistants before the attack. Non-Poisson results ...
... • Adaptation hypothesis: each resistant occurs as a separate, random event. No clones of resistants before the attack. Poisson distribution of survivors • Mutation – grows of clones of resistants before the attack. Non-Poisson results ...
Organisms That Can Bug You
... products, frozen cooked crab meat, cooked shrimp, and cooked surimi (imitation shellfish). The Listeria bacteria resist heat, salt, nitrite, and acidity better than many other microorganisms. They survive and grow at low temperatures. ...
... products, frozen cooked crab meat, cooked shrimp, and cooked surimi (imitation shellfish). The Listeria bacteria resist heat, salt, nitrite, and acidity better than many other microorganisms. They survive and grow at low temperatures. ...
File
... Prokaryotes can arrange themselves in a number of different ways. Some cocci, including the disease-causing bacteria Streptococcus and Pneumococcus, form long chains. Others, such as Staphylococcus, form large clumps or clusters. ...
... Prokaryotes can arrange themselves in a number of different ways. Some cocci, including the disease-causing bacteria Streptococcus and Pneumococcus, form long chains. Others, such as Staphylococcus, form large clumps or clusters. ...
Microorganisms
... and made of simple structures. A. Characteristics include: Prokaryotes, having a cell wall and cell membrane (helps determine how they will stain). Prokaryotes are single celled and have no central nucleus; the DNA is in a single circle. They vary in size from 0.4um to 2.0um and are found in three b ...
... and made of simple structures. A. Characteristics include: Prokaryotes, having a cell wall and cell membrane (helps determine how they will stain). Prokaryotes are single celled and have no central nucleus; the DNA is in a single circle. They vary in size from 0.4um to 2.0um and are found in three b ...
Bacteria/Protist - Science with Ms. C
... Protists are organisms that are classified into the Kingdom Protista. Although there is a lot of variety within the protists, they do share some common characteristics. Protists are usually one- celled organisms that live in all moist environments. They vary in the way they obtain food and move. Exa ...
... Protists are organisms that are classified into the Kingdom Protista. Although there is a lot of variety within the protists, they do share some common characteristics. Protists are usually one- celled organisms that live in all moist environments. They vary in the way they obtain food and move. Exa ...
Exam 2 –samples only
... 17. The most problematic yet common form of tertiary treatment of water is A) chlorine B) UV light C) ozone D) X-rays 18. 1. Food contamination is due to A) unsanitary practices by food handlers B) improper storage C) importation D) all of the above 19. Some strains of _______ can inhibit the growth ...
... 17. The most problematic yet common form of tertiary treatment of water is A) chlorine B) UV light C) ozone D) X-rays 18. 1. Food contamination is due to A) unsanitary practices by food handlers B) improper storage C) importation D) all of the above 19. Some strains of _______ can inhibit the growth ...
W.003a SINGLE-BACTERIA CONFOCAL SPECTROSCOPY
... Bacterial growth is typically monitored in bulk via absorbance. In our work, we utilized a live-cell fluorescence stain in order to monitor the presence of individual bacterium in growth condition. The confocal fluorescence detection instrument employed in this work (Fig. 1B) is designed such that t ...
... Bacterial growth is typically monitored in bulk via absorbance. In our work, we utilized a live-cell fluorescence stain in order to monitor the presence of individual bacterium in growth condition. The confocal fluorescence detection instrument employed in this work (Fig. 1B) is designed such that t ...
Fundamentals of Biological Treatment
... Lag Phase. Immediately after inoculation of the cells into fresh medium, the population remains temporarily unchanged. Although there is no apparent cell division occurring, the cells may be growing in volume or mass, synthesizing enzymes, proteins, RNA, etc., and increasing in metabolic activity. T ...
... Lag Phase. Immediately after inoculation of the cells into fresh medium, the population remains temporarily unchanged. Although there is no apparent cell division occurring, the cells may be growing in volume or mass, synthesizing enzymes, proteins, RNA, etc., and increasing in metabolic activity. T ...
Mycoplasms
... A. They stain Gram-positive but are genetically similar to Gram-negative bacteria. B. They stain Gram-negative and are genetically similar to Gram-negative bacteria. C. They stain Gram-negative but are genetically similar to Gram-positive bacteria. D. Mycoplasmas are not really bacteria. ...
... A. They stain Gram-positive but are genetically similar to Gram-negative bacteria. B. They stain Gram-negative and are genetically similar to Gram-negative bacteria. C. They stain Gram-negative but are genetically similar to Gram-positive bacteria. D. Mycoplasmas are not really bacteria. ...
Welcome to Borrelia-ville
... garinii cysts proved infective when introduced into mice and could even survive freeze-thawing. Another study suggested that Lyme spirochetes prefer the cystic form when exposed to cerebrospinal fluid, a possible reason why spinal taps often produce a low yield in diagnostic testing for Lyme disease ...
... garinii cysts proved infective when introduced into mice and could even survive freeze-thawing. Another study suggested that Lyme spirochetes prefer the cystic form when exposed to cerebrospinal fluid, a possible reason why spinal taps often produce a low yield in diagnostic testing for Lyme disease ...
Avery experiment opener
... Questions 26-28 In the 1940’s, Avery, Macleod, and McCarty transformed nonencapsulated bacteria into encapsulated. forms by growing the nonencapsulated cells in a culture containing an extract made from dead encapsulated cells. The transformed cells produced colonies of encapsulated bacteria. Three ...
... Questions 26-28 In the 1940’s, Avery, Macleod, and McCarty transformed nonencapsulated bacteria into encapsulated. forms by growing the nonencapsulated cells in a culture containing an extract made from dead encapsulated cells. The transformed cells produced colonies of encapsulated bacteria. Three ...
The Nuclear Structures of OsciZZospira
... first described by Chatton & Perard (1913) in the caecal contents of the guineapig. These workers were unable to demonstrate any nuclear structures, and for this reason they considered it to be a member of the Myxophyceae, with which classification many subsequent workers have concurred. Baker (1933 ...
... first described by Chatton & Perard (1913) in the caecal contents of the guineapig. These workers were unable to demonstrate any nuclear structures, and for this reason they considered it to be a member of the Myxophyceae, with which classification many subsequent workers have concurred. Baker (1933 ...
pGlo Lab write-up materials
... b. ___________________________ is a sterile solution that makes cells able to take in a plasmid (competent). c. Bacteria can be grown under different conditions to determine what traits they have by using ___________________. d. ________________________________ is the process of moving genes from on ...
... b. ___________________________ is a sterile solution that makes cells able to take in a plasmid (competent). c. Bacteria can be grown under different conditions to determine what traits they have by using ___________________. d. ________________________________ is the process of moving genes from on ...
Basic Principle of Microbiology
... dryness, and with very dilute and diverse energy sources. 2- Prokaryotes ] No Nucleus [ :- This Cells Form (( Bacteria – Blue green AlgeaMycoplasm-Chlamydia-Rickettsia )) - Use smaller Ribosome ( 70S ribosome ) . - Bacteria can survive and, grow in hostile environments in which the osmotic pressure ...
... dryness, and with very dilute and diverse energy sources. 2- Prokaryotes ] No Nucleus [ :- This Cells Form (( Bacteria – Blue green AlgeaMycoplasm-Chlamydia-Rickettsia )) - Use smaller Ribosome ( 70S ribosome ) . - Bacteria can survive and, grow in hostile environments in which the osmotic pressure ...
Widespread Distribution of Microorganisms
... the Domain Archaea consist entirely of microscopic prokaryotes. Although prokaryotes have DNA, no true membrane-bound nucleus is present. The third Domain, Eukarya, includes several groups containing microorganisms). All Eukarya have a true nucleus. The smallest microorganisms, the viruses, are neit ...
... the Domain Archaea consist entirely of microscopic prokaryotes. Although prokaryotes have DNA, no true membrane-bound nucleus is present. The third Domain, Eukarya, includes several groups containing microorganisms). All Eukarya have a true nucleus. The smallest microorganisms, the viruses, are neit ...
Lecture 1 - Suffolk County Community College
... Hot springs Oceans High in the atmosphere Deep inside rocks within the Earth's crust On and in other organisms bodies ...
... Hot springs Oceans High in the atmosphere Deep inside rocks within the Earth's crust On and in other organisms bodies ...
Selective & Differential media
... particular organisms. • Selective media allow certain types of organisms to grow, and inhibit the growth of other organisms. The selectivity is accomplished in several ways: • For example, organisms that can utilize a given sugar are easily screened by making that sugar the only carbon source in the ...
... particular organisms. • Selective media allow certain types of organisms to grow, and inhibit the growth of other organisms. The selectivity is accomplished in several ways: • For example, organisms that can utilize a given sugar are easily screened by making that sugar the only carbon source in the ...
Medical University of Lodz Division of Studies in English (4MD
... the growth of bacteria producing pigments, the shape and the structure of the bacterial cell (the basic and additional components), the staining methods of the bacterial preparations (simple and complex, positive and negative, positive-negative), the types of microscopes used in bacteriology and the ...
... the growth of bacteria producing pigments, the shape and the structure of the bacterial cell (the basic and additional components), the staining methods of the bacterial preparations (simple and complex, positive and negative, positive-negative), the types of microscopes used in bacteriology and the ...
WS - Endosymbiotic Theory cells
... and you suddenly have the ability to absorb sunlight and convert this light into food. Scientists believe that something like this happened 2 billion years ago to ancient single-celled organisms. At this time, there were only bacteria living on earth. Remember, bacteria are prokaryotes, this means t ...
... and you suddenly have the ability to absorb sunlight and convert this light into food. Scientists believe that something like this happened 2 billion years ago to ancient single-celled organisms. At this time, there were only bacteria living on earth. Remember, bacteria are prokaryotes, this means t ...
Extended spectrum Beta
... ESBLs are enzymes that are produced by some bacteria and confer resistance to almost all beta-lactam antibiotics (penicillins and cefalosporins), and in addition may be associated with resistance to a range of other frequently used antibiotics (e.g. ciprofloxacin, gentamicin, trimethoprim). ESBL-pro ...
... ESBLs are enzymes that are produced by some bacteria and confer resistance to almost all beta-lactam antibiotics (penicillins and cefalosporins), and in addition may be associated with resistance to a range of other frequently used antibiotics (e.g. ciprofloxacin, gentamicin, trimethoprim). ESBL-pro ...
Chapter 1: Introduction to Microbiology
... made an antibiotic, penicillin, that killed S. aureus. ¡ 1940s: Penicillin was tested clinically and mass produced. ...
... made an antibiotic, penicillin, that killed S. aureus. ¡ 1940s: Penicillin was tested clinically and mass produced. ...
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.