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Bacteria
Bacteria are a large domain of single-celled, prokaryote microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals.
2,228 Questions
What mutations cause antibiotic resistance in bacteria?
Antibiotics are generally targets a potential life process of pathogen. If a pathogen mutates its protein for example it may be complete different than the previous and may even changes its function slightly different. Thus the antibiotic that are acting on the previous form of a protein acts no more on this newly mutated protein because of its specificity.
spring and pure water comes to mind
What is bacteria toxin infection?
When harmful bacteria enter your body and produce toxins, an infection occurs. This can damage tissues and disable bodily functions.
symbiotic
How does the doctor treat bacterial inflections?
There are various types of bacterial infections, which are treated by antibiotic, according to the type.
How do doctors group bacteria?
Doctors typically group bacteria based on their characteristics, such as how they stain under a microscope, their shape and arrangement, the type of environment they thrive in, and the biochemical reactions they undergo. One commonly used classification system is based on the Gram stain, which distinguishes bacteria into Gram-positive or Gram-negative groups. Other methods, such as DNA sequencing or biochemical tests, can also be used for more detailed classification.
Is a bacteria a consumer or producer?
Good question! I was just wondering this yesterday! According to what I've learned in 8th grade, bacteria is a consumer. Hope i helped soon enough!
E coli is a bacterium. It is a single-celled organism.
How many cells does a Escherichia have?
E coli is a bacterium. It is a single-celled organism. Fyi, there is also a protozoan pathogen that goes by the same name. This E. Coli is a single-celled eukaryote, which means that its DNA is inside a structure called the nucleus, in contrast to bacteria which do not have a nucleus, and are known collectively as prokaryotes. (-;
What does the bacterial enzyme leukocidin do?
This enzyme is produced by some bacteria to kill leukocytes mainly neutrophils. The name leukocidin tells you what it does. Leuko = white + cidin = kill.
Why are basic stains attracted to the bacteria itself?
The bacterial cell wall has a negative charge. The basic stain has a positive charge. Since they have opposite charges, the bacterial cell wall and the basic stain are attracted to each other; hence the basic stain dyes the bacteria.
The worst of these foods, from worst to minor, would be:
- uncooked chicken in package with its juices - samonella is a huge risk with uncooked chicken
- BLT sandwich - mayonaise promotes fast breeding of bacteria
- turkey baked in its juices - as long as the bird is fully cooked and kept hot before serving it is okay, but gravy made from the juices could breed bacteria
- roast beef - fresh uncooked could breed bacteria
- fried chicken - is likely the least as long as the meat is thoroughly cooked at a high enough temperature
What do nitrogen fixing bacteria convert in the nitrogen cycle?
Nitrogen fixing bacteria are anaerobic bacteria present in the soil or in some plant roots that change nitrogen gas from the atmosphere into solid nitrogen compounds (e.g. ammonium salts) that plants can use in the soil.
Nitrogen fixing bacteria that are symbiotic with plants use sugars supplied by the plant they live in to provide the metabolic energy to carry out this process.
What provides rigidity to bacterial cell wall?
In bacteria, rigidity to the cell wall is provided by peptidoglycan layer. This layer is made up of cross-linked polysaccharide chains and peptide chains, forming a strong mesh-like structure around the cell that provides structural support and protection.
What is the maximum temperature you should store the bacteria plates at and why?
It all depends on what you wish to grow. If you want to grow bacteria that like to live on the skin, such as Staphylococcus aureus, then the best temperature is below normal body temperature or 86 to 95 Degrees Fahrenheit (30 to 35 Degrees Celsius). If you are interested in E.coli, then the temperature would be body temperature 95 to 98.6 Degrees Fahrenheit (35 to 37 Degrees Celsius). These do not grow well above or below these temperatures.
Which Type of bacteria responsible for closing many beaches?
Fecal coliform bacteria, such as Escherichia coli (E. coli), are often responsible for closing beaches when present in high levels. These bacteria can indicate contamination of the water with fecal matter, which poses a health risk to swimmers. Regular monitoring of water quality helps to ensure the safety of beachgoers.
How is bacteria DNA prepared for use in gene transfer?
DNA in bacteria is prepared for use in gene transfer by replicating it. When it is transferred, it is already prepared so that it can begin producing new cells based on the provided genetic material.
No, there are different bacteria.
Is bacterial generation time constant or not?
Bacterial reproduction or fission is remarkably constant for something organic.
Why don't capsules pick up the stain?
Capsules are made of polysaccharides and/or polypeptides that have no net charge. Most dyes used do have a net charge. Therefore, capsules cannot bind to charged dyes and do not stain as a result. Capsules may be revealed by methods such as Maneval's method. This method utilizes negative staining, where the background is stained revealing an unstained structure of interest: the bacterial capsule.
