Which of the Following is the Favored Carbon Source of Escherichia

Question

Which of the following is the favored carbon source of Escherichia coli?
A) lactose
B) galactose
C) sucrose
D) glucose
E) fructose

Accepted Answer

Glucose is the preferred carbon source of Escherichia coli. It can be easily metabolized and utilized for energy and to build cell components. While E. coli can also utilize other sugars such as lactose, galactose, and fructose, glucose is the most efficient and preferred choice. Sucrose requires the enzyme sucrase to be broken down into glucose and fructose before it can be utilized by E. coli, making it a less favored carbon source.