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In relation to protein describe the formation of a peptide bond/link. - Leaving Cert Home Economics - Question 1 - 2008
Question 1
In relation to protein describe the formation of a peptide bond/link.
Worked Solution & Example Answer:In relation to protein describe the formation of a peptide bond/link. - Leaving Cert Home Economics - Question 1 - 2008
Step 1
Describe the formation of a peptide bond/link.
Answer
The formation of a peptide bond involves the reaction between the amino group ( ext{NH}_2) of one amino acid and the carboxyl group ( ext{COOH}) of another amino acid. This reaction is a type of condensation reaction, which results in the elimination of a water molecule.
Step-by-step Process
- Initiation of Reaction: The amino group of the first amino acid approaches the carboxyl group of the second amino acid.
- Formation of the Peptide Bond: As the two groups come into contact, a covalent bond forms between the carbon atom of the carboxyl group and the nitrogen atom of the amino group. This process leads to the formation of a dipeptide.
- Elimination of Water: During this process, a molecule of water ( ext{H}_2 ext{O}) is eliminated, which is characteristic of condensation reactions.
Result
This reaction creates a peptide bond, which is a key link in the structure of proteins, allowing amino acids to be joined together into polypeptide chains.