Question

the process of linking monosaccharides together to make disaccharides is called dehydration synthesis. dehydration means loss of water. during dehydration synthesis, water is released when two monosaccharides chemically combine. many more monosaccharides can continue to be added to the chain, forming a large molecule called a polysaccharide. the reaction below shows a dehydration synthesis reaction. select the true statements. disaccharides break into monosaccharides during dehydration synthesis. many monosaccharides combine by dehydration synthesis to make a polysaccharide. water is a product of a dehydration synthesis reaction. long chains of monosaccharides form a disaccharide.

Explanation:

To solve this, we analyze each statement using the given information about dehydration synthesis:

1. “Disaccharides break into monosaccharides during dehydration synthesis.”

Dehydration synthesis is the formation of larger molecules (like disaccharides from monosaccharides) by removing water. Breaking down (hydrolysis) is the reverse. So this is false.

1. “Many monosaccharides combine by dehydration synthesis to make a polysaccharide.”

The text states: “Many more monosaccharides can continue to be added to the chain, forming a large molecule called a polysaccharide.” This matches, so this is true.

1. “Water is a product of a dehydration synthesis reaction.”

The text says: “Dehydration means loss of water. During dehydration synthesis, water is released when two monosaccharides chemically combine.” The reaction diagram also shows $\ce{H2O}$ as a product. So this is true.

1. “Long chains of monosaccharides form a disaccharide.”

A disaccharide is formed from two monosaccharides. Long chains (many monosaccharides) form a polysaccharide. So this is false.

Answer:

The true statements are:

• Many monosaccharides combine by dehydration synthesis to make a polysaccharide.
• Water is a product of a dehydration synthesis reaction.