IB Biology Topic B1.2.2 Condensation Reactions Forming Dipeptides and Longer Chains of Amino Acids Revision Notes (SL/HL)

IB Biology Topic B1.2.2 Condensation Reactions Forming Dipeptides and Longer Chains of Amino Acids Revision Notes (SL/HL) | RevisionDojo

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Condensation Reactions: Linking Amino Acids and Releasing Water

Amino acids join end-to-end through condensation reactions.
1. The carboxyl group (-COOH) of one amino acid reacts with the amino group (-NH₂) of the next.
2. A hydrogen atom from the amino group and a hydroxyl group (-OH) from the carboxyl group are removed.
3. These combine to form a molecule of water (H₂O), which is released as a byproduct.
The bond that forms between the remaining carbon and nitrogen is called a peptide bond.
1. It is a strong covalent bond.
2. Two amino acids linked by a single peptide bond form a dipeptide.

Amino acid + Amino acid → Dipeptide + Water

Common Mistake

The peptide bond forms between the carbon of the carboxyl group and the nitrogen of the amino group.
Students often draw it between the wrong atoms.
The bond is specifically C-N, written as -CO-NH-.

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Condensation Reactions: Linking Amino Acids and Releasing Water

Amino acids join end-to-end through condensation reactions.
1. The carboxyl group (-COOH) of one amino acid reacts with the amino group (-NH₂) of the next.
2. A hydrogen atom from the amino group and a hydroxyl group (-OH) from the carboxyl group are removed.
3. These combine to form a molecule of water (H₂O), which is released as a byproduct.
The bond that forms between the remaining carbon and nitrogen is called a peptide bond.
1. It is a strong covalent bond.
2. Two amino acids linked by a single peptide bond form a dipeptide.

Amino acid + Amino acid → Dipeptide + Water

Common Mistake

The peptide bond forms between the carbon of the carboxyl group and the nitrogen of the amino group.
Students often draw it between the wrong atoms.
The bond is specifically C-N, written as -CO-NH-.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic B1.2.2: Condensation Reactions Forming Dipeptides and Longer Chains of Amino Acids Notes

Condensation Reactions: Linking Amino Acids and Releasing Water

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Condensation Reactions: Linking Amino Acids and Releasing Water

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A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics