For each of the statements about carbohydrate fermentation e

For each of the statements about carbohydrate fermentation experiments given below, respond \"True\" or \"False\".

1.All of the species in the family Enterobacteriaceae can grow and produce acid from glucose under anaerobic conditions.

2.When the bacteria ferment the carbohydrate, the pH of the medium will go down.

3.Lipids and fats are carbohydrates.

4.Raffinose is a trisaccharide with the formula C18H32O16, it is common in plants.

5.If the bacterial strain does not grow in the broth, you cannot say if it is either positive or negative for fermenting that sugar

Solution

1.All of the species in the family Enterobacteriaceae can grow and produce acid from glucose under anaerobic conditions. True

Enterobacteriaceae are facultative anaerobes, fermenting glucose and other sugars to produce lactic acid.

2.When the bacteria ferment the carbohydrate, the pH of the medium will go down.

True

Since acids are formed during fermentation, the pH of the media go down

3.Lipids and fats are carbohydrates.

False

Carbohydrates are a separate class of biomolecules

4.Raffinose is a trisaccharide with the formula C18H32O16, it is common in plants.

True

Raffinose is composed of 3 sugars: galactose, glucose and fructose.