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Jackie Jardine

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2y ago

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How could bacteria be harmless but annoying?

bacteria is not harmless if there is alot of bacteria then you can get really sick.


Is spoiled food a sign of a visit from a bacteria?

Spoilage can be from bacteria, but it can also be caused by yeasts and molds - which are not bacteria.


Fermented by harmless bacteria added after pasteurization?

Yogurt and buttermilk are fermented by a harmless bacteria added after pasteurization to prolong their shelf lives.


Explain how the bacteria in griffith's experiment were transformed?

The harmless living bacteria took in pneumonia-causing DNA(genes) from the heat-killed, pneumonia-causing bacteria, as a result of which the harmless bacteria changed into bacteria that cause pneumonia.


Harmless bacteria produced colonies with what edges?

smooth


How can you prvent food spoilage from bacteria?

i know that 1 way is pasteurisation


How will milk in the fridge affect the bacteria that is in the milk?

Refrigeration will slow down the growth of bacteria in the milk, but not kill the bacteria. This will slow down spoilage.


Do bacteria play a role in pasteurization?

The purpose of pasteurization is to prevent spoilage by killing all microorganisms, especially bacteria.


How does pasteurization prevent spoilage?

The main way that pasteurization methods prevent food spoilage is by removing the bacteria from the food. This is done by heating the food until it is hot enough to kill the bacteria and then holding it there long enough to make sure that all bacteria are killed.


How does lactic acid keep food from spoiling?

The lactic acid is generally produced by members of the genus lactobacillus. These bacteria are generally harmless to humans. The acidic environment they create, however, harms other bacteria and prevents these potentially dangerous bacteria from growing. So, overall, the food that's being preserved will have predominantly only one type of bacteria in it, which is not harmful to humans.


Is it true that pathogenic bacteria out number helpful bacteria?

Yes, but most are weak and almost harmless.


How does pasteurization prevent food spoilage?

The main way that pasteurization methods prevent food spoilage is by removing the bacteria from the food. This is done by heating the food until it is hot enough to kill the bacteria and then holding it there long enough to make sure that all bacteria are killed.