Learning objective
Draw peptide bonds and explain condensation.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
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Questions
Topic
Amino acids, proteins and DNA (A-level only)
Subtopic
Amino acids and proteins (A-level only)
Study support
Understand this objective
Quick explanation
Draw peptide bonds and explain condensation
- This point belongs to Amino acids, proteins and DNA (A-level only), especially Amino acids and proteins (A-level only).
- You need to be able to draw peptide bonds and explain condensation.
- The key ideas to know are peptide bond.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Amino acids and proteins (A-level only) to exam-style questions, flashcards, and revision notes for Amino acids, proteins and DNA (A-level only).
Quick student answer
Which of the following correctly represents the formation of a peptide bond between two amino acids?
Direct answer
A. R1-COOH + R2-NH2 → R1-CO-NH-R2 + H2O
Key terms
- Peptide Bond: A covalent bond formed between two amino acids through a condensation reaction, resulting in the release of water.
- Condensation Reaction: A chemical reaction where two molecules combine to form a larger molecule with the elimination of a small molecule, typically water.
Common trap
Confusing peptide bonds with other types of bonds: Remember that peptide bonds are covalent bonds specifically formed between amino acids during protein synthesis.
Related questions
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Describe amino acids as molecules containing amine and carboxylic acid groups.
Amino acids and proteins (A-level only)
- Explain zwitterion formation.
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- Explain hydrolysis of proteins.
Amino acids and proteins (A-level only)
- Describe the components of DNA nucleotides.
DNA chemistry (A-level only)
- Explain condensation reactions forming the sugar-phosphate backbone.
DNA chemistry (A-level only)