Final answer:
E. Coli is negative for the Methyl red, Voges-Proskauer, and Citrate tests in the IMViC tests.
Step-by-step explanation:
In the IMViC tests, E. Coli is negative for the Methyl red test, the Voges-Proskauer test, and the Citrate test.
The Methyl red test is used to determine if a bacterium can ferment glucose to produce acids. E. Coli does not produce enough acid to yield a positive result.
The Voges-Proskauer test measures the presence of acetoin, which is produced by certain bacteria through the fermentation of glucose. E. Coli does not produce acetoin, and therefore, it is negative for this test.
The Citrate test determines if a bacterium can utilize citrate as a sole carbon source. E. Coli cannot use citrate as a carbon source, making it negative for this test as well.