Chemistry Macromolecules / Biochemistry DUHS 2022
PMDC Verified Question 27 of 47
In protein amino acid molecule are linked by:
A
Peptide linkage
B
Glycosidic linkage
C
Glucoacidic linkage
D
Ethane linkage
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Peptide linkage
Concept:

Macromolecules utilize specific covalent bonds to link their respective monomers.

Formula:

$$ \text{-CO-NH-} $$

Solution:

  • The carboxyl group of one amino acid reacts with the amino group of another, releasing water.
  • The resulting amide bond (\( \text{-CO-NH-} \)) in biochemistry is universally called a peptide linkage.


Why other options are incorrect:

Glycosidic linkages join monosaccharides together to form carbohydrates. Glucoacidic is not a standard biochemical term. Ethane linkages imply carbon-carbon alkane bonds, which do not link amino acid backbones.

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