Which sugars are primarily consumed by Lacto?

Lactobacillus, which is often referred to as "Lacto," primarily ferments sugars to produce lactic acid. The sugars that are predominantly consumed by Lacto include glucose and lactose.

Glucose is a simple sugar that is easily utilized by many microorganisms, including Lacto, for fermentation processes, leading to lactic acid production. Lactose, a disaccharide found in milk, is also a critical sugar for Lactobacillus species, particularly in dairy fermentation, since they possess the enzyme lactase that breaks it down into glucose and galactose.

While maltose is included in the other choice that states glucose, fructose, and maltose, it is not primarily consumed by Lactobacillus in the same way that glucose and lactose are. Fructose is not utilized as effectively by Lacto compared to lactose and glucose, which makes B the more appropriate selection, as it reflects the sugars that are most relevant to Lacto’s metabolic processes.