--- title: "Condensation, Hydrolysis and the Polymers of Life" description: "Carbohydrates, proteins and nucleic acids are all polymers joined by condensation and taken apart by hydrolysis. One bond-making rule covers three families of molecule." canonical: https://lightmysky.com/learn/science/condensation-hydrolysis-and-the-polymers-of-life-mt_v-M8zHd22C source: https://lightmysky.com/learn/science/condensation-hydrolysis-and-the-polymers-of-life-mt_v-M8zHd22C.md retrieved: 2026-11-12 --- > **Agent view.** This is the Markdown twin of the page, for tools and assistants. > When to use this site, and the call that answers each job: https://lightmysky.com/agent-instructions.md > API description (OpenAPI 3.1): https://lightmysky.com/openapi.json · Authentication: https://lightmysky.com/auth.md > Pricing: https://lightmysky.com/pricing.md · Catalog: https://lightmysky.com/llms.txt · Full catalog: https://lightmysky.com/llms-full.txt > Every machine-readable file on this domain: https://lightmysky.com/.well-known/ai-catalog.json > Ask for Markdown with `Accept: text/markdown`, a `.md` address, or `?mode=agent`. # Condensation, Hydrolysis and the Polymers of Life Carbohydrates, proteins and nucleic acids are all polymers joined by condensation and taken apart by hydrolysis. One bond-making rule covers three families of molecule. Subject: Science · Area: Organisms & Life Processes · Ages 16 to 17 Page: https://lightmysky.com/learn/science/condensation-hydrolysis-and-the-polymers-of-life-mt_v-M8zHd22C ## Ready when they can - States what a condensation reaction removes and what a hydrolysis reaction adds. - Names the monomer and the bond for a carbohydrate, a protein and a nucleic acid. - Works out how many water molecules were released when a chain of a given length formed. ## Lesson: Join with water out, split with water in Living things build giant molecules by chaining small ones together. Joining two pieces is called a condensation reaction, and it releases one molecule of water as the bond forms. Three families form true polymer chains of repeating pieces, and each pair is its own team. Carbohydrates link sugars with glycosidic bonds, proteins link amino acids with peptide bonds, and nucleic acids link nucleotides with phosphodiester bonds. Memorise each pair as a team and the names stop slipping. **Example.** Here is the counting trick: every new link releases one water, and links always number one fewer than pieces. A chain of 100 pieces has 99 links, so it released 99 waters when it formed and needs 99 waters to break fully apart. A chain of twelve monomers released 11 waters. Breaking apart is hydrolysis. It spends one water molecule to snap one bond open. Digestion uses hydrolysis in your gut to chop starch, protein and DNA into small pieces that blood can absorb. *(drawing: Links sit in gaps between pieces, so links number one fewer.)* Breaking needs the same link count as building. A chain of 100 pieces has 99 links, so full hydrolysis needs 99 waters, one per bond. Nucleic acids are the third team. Nucleotides link through phosphodiester bonds. Your gut snaps those bonds when it digests DNA back into nucleotides. **Recap.** One water out per link made, one water in per link broken, with links always one fewer than pieces. ## Practice 8 questions on this page, each with its working shown. ## Needs first - [Water and Hydrogen Bonding in Living Systems](https://lightmysky.com/learn/science/water-and-hydrogen-bonding-in-living-systems-mt_79dzlo6fD5) ## Opens up - [Lipids: Built by Condensation but Not Polymers](https://lightmysky.com/learn/science/lipids-built-by-condensation-but-not-polymers-mt_8-JYrLwjCw) - [Carbohydrates: anomers, mutarotation and the glycosidic bond](https://lightmysky.com/learn/science/carbohydrates-anomers-mutarotation-and-the-glycosidic-bond-mt_XpSBU8b0HN)