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Multiple Choice
Joining two monosaccharides together via a dehydration reaction creates a:
A
disulfide bond
B
glycosidic bond
C
peptide bond
D
phosphodiester bond
Verified step by step guidance
1
Understand the concept of a dehydration reaction: A dehydration reaction involves the removal of a water molecule (H₂O) to form a bond between two molecules. In the case of monosaccharides, this reaction leads to the formation of a covalent bond.
Identify the type of bond formed between monosaccharides: When two monosaccharides join via a dehydration reaction, the bond formed is called a glycosidic bond. This bond connects the anomeric carbon of one monosaccharide to a hydroxyl group of another monosaccharide.
Compare the other bond types listed: Disulfide bonds are formed between sulfur atoms in cysteine residues, peptide bonds are formed between amino acids in proteins, and phosphodiester bonds are found in nucleic acids linking nucleotides. None of these are relevant to monosaccharide linkage.
Visualize the reaction: The hydroxyl group (-OH) from one monosaccharide and a hydrogen atom (H) from another monosaccharide are removed as water (H₂O), leaving behind an oxygen atom that forms the glycosidic bond between the two monosaccharides.
Conclude the correct answer: Based on the reaction mechanism and the type of bond formed, the correct answer is 'glycosidic bond,' which is specific to the linkage of monosaccharides.