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.
chemical structure diagram
select the true statements.

• long chains of monosaccharides form a disaccharide.
• many monosaccharides combine by dehydration synthesis to make a polysaccharide.
• disaccharides break into monosaccharides during dehydration synthesis.
• water is a product of a dehydration synthesis reaction.

Explanation:

1. Analyze "Long chains of monosaccharides form a disaccharide": A disaccharide is formed from two monosaccharides, while long chains form polysaccharides. So this is false.
2. Analyze "Many monosaccharides combine by dehydration synthesis to make a polysaccharide": The text states that many monosaccharides can be added via dehydration synthesis to form a polysaccharide. This is true.
3. Analyze "Disaccharides break into monosaccharides during dehydration synthesis": Dehydration synthesis is for building (combining), while breaking down is hydrolysis. So this is false.
4. Analyze "Water is a product of a dehydration synthesis reaction": The reaction shown and the text state that water is released (a product) during dehydration synthesis. This is true.

Answer:

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