Question

You are studying carbohydrate metabolism in a newly identified bacterial species, which you note grows exclusively on carbohydrate sucrose. How would the sucrose (a disaccharide) be utilized exclusively in glycolysis?

a) Sucrose is directly converted to glucose-1-phosphate by sucrase
b) Sucrose is hydrolyzed into glucose and fructose by sucrase
c) Sucrose is converted to lactose and then enters glycolysis
d) Sucrose is directly incorporated into the citric acid cycle

Answer 1

Sucrose is hydrolyzed into glucose and fructose by sucrase, which allows the monosaccharides to enter the glycolysis pathway for metabolism.

Step-by-step explanation:

The correct answer is b) Sucrose is hydrolyzed into glucose and fructose by sucrase. Sucrose is broken down by the enzyme sucrase into its constituent monosaccharides, glucose and fructose. These monosaccharides can then enter the glycolysis pathway for further metabolism.