Amino acids, proteins and DNA (A-level only) study guide

Study Guide: Amino Acids, Proteins, and DNA

Key Concepts

Amino Acids

• Structure: Understand the general structure of amino acids, including the amine and carboxylic acid groups.
• Zwitterions: Be able to explain how amino acids can exist as zwitterions in solution and the significance of this form.

Peptide Bonds

• Formation: Know how peptide bonds are formed through condensation reactions and the role of water in this process.
• Function: Recognize the importance of peptide bonds in linking amino acids to form proteins.

Protein Hydrolysis

• Process: Be familiar with the hydrolysis of proteins and how it leads to the release of free amino acids.
• Applications: Understand the biological significance of protein hydrolysis in digestion and metabolism.

DNA Structure

• Nucleotide Components: Identify the components of DNA nucleotides and their arrangement in the DNA molecule.
• Sugar-Phosphate Backbone: Explain how the sugar-phosphate backbone is formed and its importance in maintaining DNA structure.

Base Pairing and Information Storage

• Complementary Base Pairing: Describe the rules of base pairing and the role of hydrogen bonds in stabilizing the DNA double helix.
• Information Storage: Link the structure of DNA to its function in storing genetic information and facilitating replication.