Question

if the medium turns red after the addition of the methyl red reagent, the organism must produce ...... during fermentation of .......

Answer 1

Solution:-

Methyl Red reagent is yellow weak acid which converts into red neutral molecules when dissociates in water. It is an indicator solution which helps in indicating the pH of broth culture in test. Methyl red have the ability of an organism to produce acid and maintain its end products from fermentation of glucose. Methyl red positive means when culture medium turns red after addition of MR reagent it produces large quantity of acid with pH at or below 4.4 from fermentation of carbohydrate i.e. glucose.

So, the answer are acid and glucose.

​if the medium turns red after the addition of methyl red reagent the organism must produce acid during fermentation of glucose.