I think it is A and D (at least those are the ones that made the most sence to me).
Answer:
Option B is correct.
Explanation:
Carbohydrate fermentation test; its main purpose is to know if a bacteria can ferment a specific carbohydrate or not. The test can be used for distinguishing bacterial species.
When fermentation of carbohydrate occurs, gaseous acids are produced. This production of the acid lower the pH of the medium undergoing the test, which can be detected by the color change of the pH indicator.
The Color changes only when sufficient amount of acid is produced. Phenol red can easily detect single acid production but METHYL RED NEED MORE ACID.
Hope this helps good luck. Mark brainest
Answer: Yes
It is possible to tell if the bacteria on the lb plate are ampicillin resistant just by looking at it because of the presence of colonies. This would indicate that ampicillin has lost its ability to effectively control or kill bacterial growth for it continues to multiply despite the presence of therapeutic level of ampicillin. Moreover, bacteria become resistant by gene mutation and by acquiring resistance from another bacterium through the widespread misuse of antibiotic.
