Digestion of carbohydrate begins in the————,stop in the ————- and is completed in the ——————.

Digestion of carbohydrate begins in the mouth, stop in the stomach and is completed in the small intestine.

Explanation:

When we eat food which contains carbohydrate, its digestion starts in the mouth. The saliva in the mouth mix with the food and starts its digestion. After that, it goes to the stomach, sucrose and starch is broken down in simpler substances like glucose and fructose due to sucrase and amylase enzymes.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.