Multiple Choice
Which of the following nitrogenous bases is found only in RNA and not in DNA?
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3. Chemical Reactions
Functional Groups in Chemistry
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Which type of linkage in starch is formed as a result of condensation reactions between glucose monomers?
A
Peptide bond
B
Disulfide bond
C
Ester linkage
D
α(1→4) glycosidic linkage
Verified step by step guidance1
Understand that starch is a polysaccharide made up of glucose monomers linked together.
Recognize that the linkage between glucose units in starch is formed through a condensation reaction, which involves the removal of a water molecule.
Recall that in carbohydrates, the bonds formed between monosaccharides are called glycosidic linkages.
Identify that in starch, the specific glycosidic linkage is an alpha (α) linkage between the 1st carbon of one glucose and the 4th carbon of the next glucose, denoted as α(1→4) glycosidic linkage.
Note that peptide bonds are found in proteins, disulfide bonds stabilize protein structure, and ester linkages are common in lipids, so these are not the correct linkages for starch.
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