Question

Alpha 1, 4, glycosidic bonds are broken when
A. Lipid is digested by lipase
B. Protein is digested by pepsin
C. Starch is digested by amylase
D. None of the above

Answer 1

Starch is a polymeric sugar composed of a huge number of glucose units that are combined by glycosidic bonds. Amylase is a protein that digests sugars. It is discharged by the salivary organ. It follows up on the alpha-1, 4-glycosidic linkages of alpha-connected polysaccharides, for example, starch and glycogen to yield oligosaccharides.

Complete answer:
Starch is a polysaccharide made out of glucose monomers and records for ~ 60% of the sugars devoured by people. Starch can exist in one of two structures – direct chains (amylose) or branched chains (amylopectin). The digestion of starch is started by salivary amylase in the mouth and proceeded by pancreatic amylase in the digestive organs .Starch processing by amylase doesn't happen in the stomach as the pH is inadmissible for amylase action (ideal pH ~ 7) Amylase digests amylose into maltose subunits (disaccharide) and condensations amylopectin into branched chains called dextrins .Both maltose and dextrin are processed by enzymes (maltase) which are fixed to the epithelial coating of the small intestine.The hydrolysis of maltose/dextrin brings about the arrangement of glucose monomers.
a-Amylases (salivary and pancreatic) break 1,4-glycosidic bonds in starch, giving maltose, maltotriose, and $\alpha$-limit dextrins.

So, the correct answer is option C.

Note:
Digestion is the mechanical and chemical separate of food into little natural pieces. It is critical to separate macromolecules into more smaller parts that are of appropriate size for assimilation over the stomach related epithelium. Huge, complex atoms of proteins, polysaccharides, and lipids must be decreased to simpler particles, for example, sugar before they can be consumed by the stomach related epithelial cells. Various organs assume explicit functions in the digestion. The creature diet needs starches, protein, and fat, just as nutrients and inorganic parts for wholesome diet.