Question

question 7. 1 point
how is sucrose formed? choose the best answer.
select the correct answer below:
sucrose is formed when two monosaccharides undergo a combustion reaction.
sucrose is formed when a long chain of monosaccharides is linked by glycosidic bonds.
sucrose is formed when a monomer of glucose and a monomer of fructose are joined in a dehydration reaction to form a glycosidic bond. in this process, a water molecule is lost.
sucrose is formed when a monomer of glycogen and a monomer of fructose are joined in a dehydration reaction to form a glycosidic bond. in this process, a water molecule is lost.

Explanation:

Sucrose is a disaccharide. Disaccharides are formed by the joining of two monosaccharides. Glucose and fructose are monosaccharides. When they combine via a dehydration reaction (where a water molecule is removed), they form a glycosidic bond to create sucrose. Combustion reactions are not involved in sucrose formation. A long - chain of monosaccharides linked by glycosidic bonds would form a polysaccharide (not sucrose which is a disaccharide). Glycogen is a polysaccharide, not a monomer used in sucrose formation.

Answer:

Sucrose is formed when a monomer of glucose and a monomer of fructose are joined in a dehydration reaction to form a glycosidic bond. In this process, a water molecule is lost.