Question

3 & 4

If our body mainly uses the monosaccharide glucose for energy, how is it possible that thoe polysaccharide starch, and the disaccharides lactose and sucrose can be used for energy? The enzyme a-amylase cleaves disaccharides from the non-reducing ends of amylose and amylopectin (the major components of starch). Draw the disaccharide produced by the a- amylase acting on a component of starch. (Refer to structures at the end of this lab.)

Answer 1

3.

Complex sugars cannot be used for body matabolism; therefore, they are converted to simple sugars by enzymes, so that they can be utilized for body metabolism. Enzymes such as amylase, maltase, etc., breaks down complex carbohydrates (polysaccharides and disaccharides) to simple carbohydrates (monosachharides).

Amylase breaks down polysachharides (amylose) to disaccharides such as maltose. Maltase enzyme breaks down disachharides to monosaccharides such as glucose.

4.

alpha-maltase enzyme converts amylose and amylopectin to maltose. Maltose is disaccharide of 2 alpha-D-glucose.

amul ose and amyloput IJ hydrolysed bl 0 Ho Ho an CH,0H 애 애 애 malfose iacehanide t-ormed given above