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Chapter 5: Q5.2-2CC. (page 72)

A dehydration reaction joins two glucose molecules to form maltose. The formula for glucose is C6H12O6. What is the formula for maltose?

Short Answer

Expert verified

C12H22O11is the formula for maltose.

Step by step solution

01

Dehydration reaction

Dehydration is a chemical reaction in which a water molecule is released during the synthesis of a polymer. When a bond between two monomers is created, a water molecule is produced during this reaction.

This process is characterized as dehydration because it loses a water molecule, the polar opposite of the hydrolysis event, which uses water.

02

Formation of glucose polymer

The most prevalent monomer in nature is glucose. Glucose molecules are bonded together during the development of a glucose polymer, with each bond resulting in the removal of a water molecule.

Between two monosaccharides, a glycosidic bond is formed when glucose molecules join. For instance, maltose is formed when two glucose molecules unite.

03

Formula of maltose

C6H12O6. is the formula for glucose. Because maltose is made up of two glucose units, the formula for maltose must be C12H24O12. However, when two glucose molecules and a glycosidic bond are formed between two glucose units during polymerization, a water molecule is lost. As a result, maltose's chemical formula is C12H22O11, not C12H24O12.

Thus, dehydration synthesis joins the two glucose units, with one water molecule lost during the process. As a result, maltose has the formula C12H22O11.

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Most popular questions from this chapter

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Go to Figure 5.23a and, for the top three nucleotides, number all the carbons in the sugars, circle the nitrogenous bases, and star the phosphates.

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(C) They generally solidify at room temperature.

(D) They contain more hydrogen than do saturated fats having the same number of carbon atoms.

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

(A) The two strands of the double helix would separate.

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The molecular formula for glucose is\({C_6}{H_{12}}{O_6}\). What would be the molecular formula for a polymer by linking ten glucose molecules together by dehydration reactions?

(A)\({C_{60}}{H_{120}}{O_{60}}\)

(B)\({C_{60}}{H_{102}}{O_{51}}\)

(C)\({C_{60}}{H_{100}}{O_{50}}\)

(D)\({C_{60}}{H_{111}}{O_{51}}\)
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