Concept explainers
Which
a. carboxyl
b. amino
c. hydroxyl
d. carbonyl
e. sulfhydryl

Introduction:
Biomolecules are the organic compounds that form carbohydrates, lipids, proteins, and nucleic acids. They are called so because these molecules are essential for the survival of living organisms. The common functional groups present in biomolecules are
Answer to Problem 1TYK
Correct answer:
Carboxyl group contains a double bond and forms organic acid.
Explanation of Solution
Justification for the correct answer:
Option (a) is carboxyl. The group that contains a double bond and forms organic acids is the carboxyl group. The organic acids are carboxylic acids and this functional group contains a double bond between carbon and oxygen. The carboxyl group is present in fatty acids (lipids). Hence, option (a) is correct.
Justification for the incorrect answers:
Option (b) is amino. The amino group is
Option (c) is hydroxyl group. The hydroxyl group is
Option (d) is carbonyl. The carbonyl group is
Option (e) is sulfhydryl. The sulfhydryl group is
Hence, options, (b), (c), (d) and (e) are incorrect.
Therefore, it can be concluded that a group that contains double bond and forms organic acids is the carboxyl group. The organic acids formed are known as carboxylic acids. It is also present in fatty acids (lipids).
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Chapter 3 Solutions
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