Why is it essential to have pure culture for biochemical test?

Answer 1

If the culture contains any unwanted organisms, it could skew the results of the biochemical test potentially producing false-positive or false-negative results of the test. If the culture contains any unwanted organisms, it could skew the results of the biochemical test potentially producing false-positive or false-negative results of the test.

Answer 2

If you attempt to identify a culture that is not pure(in other words, containing two or more different species of bacteria), then you may incorrectly identify the bacteria you intend to find. A pure culture ensures that only one type of bacteria is present and ensures one answer regardless of how many times you test it.

Answer 3

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Answer 4

This is to ensure that only the correct bacteria to be grown in the medium is grown and there is no contamination.This is to prevent incorrect identification of bacteria as the medium is contaminated. Hence, pure cultures must be used.

Answer 5

Pure cultures are important in Microbiology for the following reasons:

• Once purified, the isolated species can then be cultivated with the knowledge that only the desired microorganism is being grown.
• A pure culture can be correctly identified for accurate studying and testing, and diagnosis in a clinical environment.
• Testing/experimenting with a pure culture ensures that the same results can be achieved regardless of how many time the test is repeated.

Answer 6

To isolate specific microorganisms for study, classification, identification, genetics, production of certain organic substances, etc. If you need any ONE type of microorganism, you will need to perform aseptic techniques to aqcuire your pure culture.