Which biochemical characteristic is common in most members of the Enterobacteriaceae family?

Which biochemical characteristic is common in most members of the Enterobacteriaceae family?

• A. Ability to produce hydrogen sulfide
• B. Ability to ferment lactose
• C. Ability to produce acid from glucose
• D. Formation of endospores

Answer: (C)

The ability to produce acid from glucose is a biochemical characteristic common in most members of the Enterobacteriaceae family. This family of bacteria typically undergoes fermentation, which converts glucose into acid, contributing to a decrease in the pH of the medium. This characteristic is particularly useful in laboratory settings, such as during the fermentation tube tests and in differentiating various species within the family. While some members may not ferment lactose, the production of acid from glucose is a more universally applicable trait among Enterobacteriaceae. This capability is fundamental to their metabolic processes and is often observed in laboratory cultures, making it a reliable characteristic for identification. In contrast, the ability to produce hydrogen sulfide is not seen in all members, as it is specific to certain species. The ability to ferment lactose is also a trait that varies among members, with some being lactose fermenters and others not. The formation of endospores is a characteristic of certain bacteria within the Bacillus and Clostridium genera, and not characteristic of the Enterobacteriaceae family, which predominately does not form endospores. Hence, the ability to produce acid from glucose is the most widely shared characteristic in this diverse group of bacteria.

The ability to produce acid from glucose is a biochemical characteristic common in most members of the Enterobacteriaceae family. This family of bacteria typically undergoes fermentation, which converts glucose into acid, contributing to a decrease in the pH of the medium. This characteristic is particularly useful in laboratory settings, such as during the fermentation tube tests and in differentiating various species within the family.

While some members may not ferment lactose, the production of acid from glucose is a more universally applicable trait among Enterobacteriaceae. This capability is fundamental to their metabolic processes and is often observed in laboratory cultures, making it a reliable characteristic for identification.

In contrast, the ability to produce hydrogen sulfide is not seen in all members, as it is specific to certain species. The ability to ferment lactose is also a trait that varies among members, with some being lactose fermenters and others not. The formation of endospores is a characteristic of certain bacteria within the Bacillus and Clostridium genera, and not characteristic of the Enterobacteriaceae family, which predominately does not form endospores. Hence, the ability to produce acid from glucose is the most widely shared characteristic in this diverse group of bacteria.