This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: nutrition and digestion, Subject name: Biochemistry
The brush border bound hydrolase linked with sucrase is 
Select and explain. 
A. Alpha dextrinase, B. Glucose hydrolase, C. Trehalase, D. Alpha fructase
A: Alpha dextrinase
Answer: A: Alpha dextrinase 
Explanation: Hydrolysis of sucrose (optical rotation +66.5deg) will produce one molecule of glucose (+52.5deg) and one molecule of fructose (-92deg). Therefore the products will change the dextrorotation to levorotation, or the plane of rotation is inveed. Equimolecular mixture of glucose and fructose thus formed is called inve sugar. The enzyme producing hydrolysis of sucrose is called sucrase or invease. Honey contains inve sugar. Inve sugar is sweeter than sucrose.Ref: DM Vasudevan, page no: 68