Bacteria

The immune system is the body's defense system that helps fight off bacteria and viruses. It is made up of a network of cells, tissues, and organs that work together to protect the body from harmful pathogens.

True

I am not sure about food but I know cold water supports bacteria growth! This is why you should always wash everything with HOT water!

e coli because optimal growth of E. coli occurs at 37°C (98.6°F)

Viruses are, by far, the smallest. Bacteria and yeast cells have a complete cell structure,

including the nucleus and all of the other parts of a cell. Viruses don't, so they have to inject their 'material' (I don't remember the name of the inside the virus) into the 'host' cell and force it to duplicate the viruses, which kills the host cell.

Because too much heat can kill bacteria. Think of pasteurised milk - the pasteurising process involves rapid heating and cooling to kill off any bacteria that might be present in the milk.

Well, my biology class was just learning about this. Transgenic organisms are bacteria, plants, or animals that are genetically modified to produce a desired product. Bacteria can be modified from frost plus to frost free, so that when they live on and near crops, making them frost free, which lengthens growing season. Some can be modified with insect toxins and live in and on roots which protects the plants from insects eating them. Scientists have also enhanced their ability to break down oil to help with oil spills. Another is to "clean" toxins in toxic waste dumps. These are just the examples that our teacher gave us. There are many more ways bacteria can be modified.

Some ways to keep bacteria away is by washing your hands frequently, as in after going to the bathroom, after being in public places (e.g. Malls, movies, school, etc.), before and after handling an animal, and before and after eating. Another good thing to do is try not to touch your face and especially not the openings (mouth, nose, eyes, and ears) because that is one of the only ways for bacteria to get in your body. If you have to sneeze or cough, don't do it on your hand, because then you could shake hands with someone else and spread the bacteria. So instead of sneezing or coughing in your hand, instead do it in your elbow. That way you won't spread the germs and won't get the germs on your face.

Bacteria multiply every 15 mins (on average), so...

3 x 60 = 180


180/15 = 12


This means that the bacteria will multiply roughly 12 times.


Assuming you start off with just 1 bacteria...


After the first 15 mins, it would have multiplied itself, so you would have 2 bacteria, and so on. So...


1 - 1 x 2 = 2


2 - 2 x 2 = 4


3 - 4 x 2 = 8


4 - 8 x 2 = 16


5 - 16 x 2 = 32


6 - 32 x 2 = 64


7 - 64 x 2 = 128


8 - 128 x 2 = 256


9 - 256 x 2 = 512


10 - 512 x 2 = 1024


11 - 1024 x 2 = 2048


12 - 2048 x 2 = 4096


So you would have roughly 4096 bacteria after 3 hours

Chloramphenicol is one of the broad spectrum antibiotic used to treat typhoid fever. Resistance occur by way of mutation in ribosomes, By way of decreased permeability of cell wall and production of inactivating enzyme.

I'm going to answer your question as, "What animals cells use engulfing as a means of cellular transport?" As an active form of cellular transport, engulfing requires energy. It is used, most noteably, by our white blood cells when they seek to destroy invaders, such as undesireable bacteria and/or viruses. This process is referred to as endocytosis, or more specifically, phagocytosis.

7th grade life science teacher

The word pathogenic means disease causing. So they can be harmful...but some pathogenic bacteria only are harmful to plants or dogs or cats, etc.

There are many kind of true bacterias, since they are all around and on us. But here is one type of true bacteria. It's the blue green bacteria that you sometimes see on the edge of ponds. This is a green slimy growth.

The correct spelling is "staph infection." "Staph" is shorthand for staphylococcus, a kind of bacteria.

bacteria

They are fungus spores born within a cell. Endospore formation is triggered by lack of nutrients

The four things are oxygen, food (nutrients), warmth, and time. Two others can be moisture and acidity, but the above 4 are more prevalent.

-nutrients are needed for energy, nitrogen (for DNA and proteins), phosphorus (for energy), and others.

-warmth is needed so the bacteria can stay warm..... kinda obvious. if you've ever grown bacteria, you need an incubator to keep them warm overnight.

-oxygen is needed so the bacteria can, again, make energy.

-time is needed for the bacteria to complete binary fission over and over again.

-acidity is needed so the bacteria can survive in its environment. highly base or acidic environments may harm the bacteria and hinder its lifespan.

It usually depends on the type of bacteria you are looking to kill. Most generic bacteria will be destroyed at an oven temperature at around 250 degrees Fahrenheit. Most people are incorrect though when they assume that it's just heat alone that kills bacteria as both pressure from autoclaves and the tremendous heat that does away with any bacterial organism.

Rennin deactivate the casein micelles in milk, causing a distinct separation of curd protein (solid) and whey protein (liquid).

The four groups of photosynthetic bacteria are brownish nonsulfur, green sulfur, purple sulfur, and purple nonsulfur bacteria. Bacteria constitute a significant domain of what are referred to as prokaryotic microorganisms.

Bacillus Cereus lives in food for the most part. An example would be rice, but its not only rice. Cooked cereals and potatoes can carry this bacteria too including any food with sauces. Even salads are found to be harboring bacteria! Yucky.

There are many types of bacteria. It depends on what you are looking at as "type". There are cocci, bacilli, spirchetes (among other shapes) all referring to the shape of the bacteria. Of those they may be Gram positive or Gram Negative.

There are anaerobes, aerobes, microaerophillic, and falcultative - all referring to the oxygen requirements of the bacteria.

There are many other "types", but I would go with shape and Gram +/- such as "Gram + Cocci" as one type.

Bacteria reproduce asexually by binary fission which means that the DNA molecule will make a copy of itself and attach to the cell membrane. Bacteria is able to grow where there is moisture, food and warm temperatures.

In terms of microbiology, S. aureus and S. epi can be differentiated through a number of metabolic tests. The tests being Methyl Red, Vogues-Prauskauer, Mannitol fermentation (of which S. aureus would be + and S. epi - ) and Oxidase (S. aureus - and S. epi + ).