객관식
Which of the following is a functional group commonly found in organic molecules?
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2. Molecular Representations
Functional Groups
객관식
Which type of bond joins the group of one molecule to the group of another molecule?
A
Ionic bond
B
Hydrogen bond
C
Disulfide bond
D
Peptide bond
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검증된 단계별 안내1
Identify the functional groups involved: the \( \mathrm{C O} \) (carbonyl) and \( \mathrm{O H} \) (hydroxyl) group together form a carboxyl group (\( -\mathrm{COOH} \)), and the \( \mathrm{N H H_2} \) group is an amino group (\( -\mathrm{NH_2} \)).
Understand that when these two groups from different molecules react, they form a covalent bond known as a peptide bond, which links amino acids in proteins.
Recall that a peptide bond is formed by a condensation (dehydration) reaction where the hydroxyl group (\( -\mathrm{OH} \)) from the carboxyl group and a hydrogen atom (\( \mathrm{H} \)) from the amino group are removed as water (\( \mathrm{H_2O} \)).
Write the general reaction for peptide bond formation: \(\n\)\(\n\)\( \mathrm{R_1{-}COOH} + \mathrm{R_2{-}NH_2} \rightarrow \mathrm{R_1{-}CO{-}NH{-}R_2} + \mathrm{H_2O} \)
Recognize that the bond joining the carbonyl carbon (\( \mathrm{C=O} \)) of one molecule to the nitrogen (\( \mathrm{N} \)) of another molecule is the peptide bond, a special type of amide bond critical in protein structure.
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