Scientific American, February 2010, p
... past 100 years in taming some species with antibiotics, but the harmful bacteria have also found ways to resist many of those drugs. It is an arms race that humans have been losing of late, in part because we have not understood our enemy very well. Historically, microbiologists sought to learn how ...
... past 100 years in taming some species with antibiotics, but the harmful bacteria have also found ways to resist many of those drugs. It is an arms race that humans have been losing of late, in part because we have not understood our enemy very well. Historically, microbiologists sought to learn how ...
growth and reproduction of bacteria
... It is the time, covering the beginning of division of the mother cell up to the formation of two new cells. The average generative time is about 20 – 30 minutes in a majority of medically important bacteria. They are some exceptions among pathogenic bacteria: ...
... It is the time, covering the beginning of division of the mother cell up to the formation of two new cells. The average generative time is about 20 – 30 minutes in a majority of medically important bacteria. They are some exceptions among pathogenic bacteria: ...
1-Bacterial Structure & Genetics
... rigid part , mucopeptide composed of alternating strands of N- acetyl muramic acid and N- acetyle glucosamine linked with peptide sub units. ...
... rigid part , mucopeptide composed of alternating strands of N- acetyl muramic acid and N- acetyle glucosamine linked with peptide sub units. ...
02 Classification and Morphology of Microorganisms
... and presumably play a role similar to that of histones in eukaryotic chromatin The DNA is seen to be a single, continuous, "giant" circular molecule with a molecular weight of approximately 3 X 109. The unfolded nuclear DNA would be about 1-3 mm long (compared with an average length of 1 to 2 µm for ...
... and presumably play a role similar to that of histones in eukaryotic chromatin The DNA is seen to be a single, continuous, "giant" circular molecule with a molecular weight of approximately 3 X 109. The unfolded nuclear DNA would be about 1-3 mm long (compared with an average length of 1 to 2 µm for ...
Chapter 15: Microbial Mechanisms of Pathogenecity Below you will
... Bacterial kinases break down fibrin. Kinases can destroy a clot that was made to isolate the bacteria, thus allowing the bacteria to spread. Hyaluronidase dissolves the hyaluronic acid that binds cells together. This could allow the bacteria to spread through tissues. 9. Pathogenic fungi do not have ...
... Bacterial kinases break down fibrin. Kinases can destroy a clot that was made to isolate the bacteria, thus allowing the bacteria to spread. Hyaluronidase dissolves the hyaluronic acid that binds cells together. This could allow the bacteria to spread through tissues. 9. Pathogenic fungi do not have ...
Structure and Function of Bacterial Cells Part 2
... Outer membrane of Gram-negatives has two important properties 1. It protects the cells from permeability by many substances including penicillin and lysozyme. 2. It is the location of lipopolysaccharide (endotoxin) which is toxic for animals. ...
... Outer membrane of Gram-negatives has two important properties 1. It protects the cells from permeability by many substances including penicillin and lysozyme. 2. It is the location of lipopolysaccharide (endotoxin) which is toxic for animals. ...
Introduction to Biotechnology
... eukaryotic cells are separated from the rest of the cell by the nuclear membrane, whereas in prokaryotic cells these materials are not separated. • All animals and plant cells are eukaryotic including fungi. Bacteria, cyanobacteria and the mycoplasmas are ...
... eukaryotic cells are separated from the rest of the cell by the nuclear membrane, whereas in prokaryotic cells these materials are not separated. • All animals and plant cells are eukaryotic including fungi. Bacteria, cyanobacteria and the mycoplasmas are ...
Cell Wall 2
... osmotic shock and physical damage. In addition, it also confers rigidity and shape of bacterial cells. Although bacterial cell walls all consist of peptidoglycan, also known as murein or mucopeptide, they differ in certain properties in two groups of bacteria, namely gram-negative and gram-positive. ...
... osmotic shock and physical damage. In addition, it also confers rigidity and shape of bacterial cells. Although bacterial cell walls all consist of peptidoglycan, also known as murein or mucopeptide, they differ in certain properties in two groups of bacteria, namely gram-negative and gram-positive. ...
Virus and Bacteria notes
... o spiral, called spirilla or spirochetes o spherical, called cocci Lactobacilli: rod-shaped ...
... o spiral, called spirilla or spirochetes o spherical, called cocci Lactobacilli: rod-shaped ...
Bacteria and Germs
... What are bacteria and germs? • Ubiquitous-They are everywhere. • Reproduce very quickly – Fastest is approximately 15 min/generation – Evolve very fast • Antibiotic resistance ...
... What are bacteria and germs? • Ubiquitous-They are everywhere. • Reproduce very quickly – Fastest is approximately 15 min/generation – Evolve very fast • Antibiotic resistance ...
Introduction to microbiology - KSU Faculty Member websites
... Spheroplast Bacteria with damaged cell wall. The damage is cause by the action of toxic chemical or an antibiotic such as Penicillin can changed to there regular fore if grown on a culture media L-form Mutant bacteria without cell wall 3. Bacterial capsule Many bacteria secrete around themselves ...
... Spheroplast Bacteria with damaged cell wall. The damage is cause by the action of toxic chemical or an antibiotic such as Penicillin can changed to there regular fore if grown on a culture media L-form Mutant bacteria without cell wall 3. Bacterial capsule Many bacteria secrete around themselves ...
BioSc221/325 Exam 1 Name
... Thioglycolate medium is used for the cultivation of anaerobic, aerobic, facultative or microaerophilic microorganisms. This is made possible by the formation of a gradient of oxygen concentrations throughout the test tube. The presence of thioglycolate removes free molecular oxygen from the medium w ...
... Thioglycolate medium is used for the cultivation of anaerobic, aerobic, facultative or microaerophilic microorganisms. This is made possible by the formation of a gradient of oxygen concentrations throughout the test tube. The presence of thioglycolate removes free molecular oxygen from the medium w ...
Bacterial DNA Fingerprint Detection
... based on DNA sequence. The technology in capable of identifying bacterial strains, and assigns an identity number to bacterial strain based on a Simple Sequence Repeat (SSR). This technology can accurately, identify bacteria quite parallel to the human forensic database that the FBI builds up for cr ...
... based on DNA sequence. The technology in capable of identifying bacterial strains, and assigns an identity number to bacterial strain based on a Simple Sequence Repeat (SSR). This technology can accurately, identify bacteria quite parallel to the human forensic database that the FBI builds up for cr ...
Plate 16 - Bacterial Spores
... – Does it still exist? – Is it one of the daughter cells? Which one? ...
... – Does it still exist? – Is it one of the daughter cells? Which one? ...
Biology Study Guide
... different stages. During one stage of the life cycle, the female stays attached to the lobster’s bristles, and is about 0.35 mm in length. This stage is shown in the figure below. A tiny male clings to this female. There are also stages in the life cycle of S. pandora when the organism swims freely ...
... different stages. During one stage of the life cycle, the female stays attached to the lobster’s bristles, and is about 0.35 mm in length. This stage is shown in the figure below. A tiny male clings to this female. There are also stages in the life cycle of S. pandora when the organism swims freely ...
BACTERIA Old kingdom name : Monera ( monerans ) Today
... 1. Cell wall composition : all contain peptidoglycan - carbohydrate and protein polymer found in cell wall IMPORTANCE - the amount of peptidoglycan found in the cell wall varies depending on the SPECIES of bacteria * this difference can be used to IDENTIFY and CLASSIFY bacteria Thickness of peptidog ...
... 1. Cell wall composition : all contain peptidoglycan - carbohydrate and protein polymer found in cell wall IMPORTANCE - the amount of peptidoglycan found in the cell wall varies depending on the SPECIES of bacteria * this difference can be used to IDENTIFY and CLASSIFY bacteria Thickness of peptidog ...
Culturing Bacteria
... • Prokaryotic organism; which means they do not have a defined nucleus, so the DNA strands float in the cell cytoplasm ...
... • Prokaryotic organism; which means they do not have a defined nucleus, so the DNA strands float in the cell cytoplasm ...
Endosymbiotic Theory
... were coded into the eukaryote's genetic master plan/blueprint, or DNA. In other words, the organelles existed because they were stipulated to exist by the DNA, much like why all humans have hands or feet. When Margulis initially proposed the Symbiotic Theory, she predicted that, if the organelles we ...
... were coded into the eukaryote's genetic master plan/blueprint, or DNA. In other words, the organelles existed because they were stipulated to exist by the DNA, much like why all humans have hands or feet. When Margulis initially proposed the Symbiotic Theory, she predicted that, if the organelles we ...
슬라이드 1
... : released only when the cells are lysed : powerful activator of acute-phase and inflammatory reactions : The lipid A portion of LPS is responsible for endotoxin activity. - Endotoxin is not the same as exotoxin - only gram-negative bacteria make endotoxin ...
... : released only when the cells are lysed : powerful activator of acute-phase and inflammatory reactions : The lipid A portion of LPS is responsible for endotoxin activity. - Endotoxin is not the same as exotoxin - only gram-negative bacteria make endotoxin ...
bacteria_2_-_identification__reproduction_web_version
... Penicillins: Inhibits formation of the bacterial cell wall by blocking cross-linking of the cell wall structure. The cell wall is a needed protective casing for the bacterial cell. Bacitracin: Inhibits cell wall production by blocking the step in the process (recycling of the membrane lipid carrier) ...
... Penicillins: Inhibits formation of the bacterial cell wall by blocking cross-linking of the cell wall structure. The cell wall is a needed protective casing for the bacterial cell. Bacitracin: Inhibits cell wall production by blocking the step in the process (recycling of the membrane lipid carrier) ...
- 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 ...
Bacterial cell structure
Bacteria, despite their simplicity, contain a well-developed cell structure which is responsible for many of their unique biological structures. Many structural features are unique to bacteria and are not found among archaea or eukaryotes. Because of the simplicity of bacteria relative to larger organisms and the ease with which they can be manipulated experimentally, the cell structure of bacteria has been well studied, revealing many biochemical principles that have been subsequently applied to other organisms.