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Flashcards · Biology · Respiration and Biological Molecules

Monomers and Polymers

17 cards

  1. What is a monomer?

    A small molecule that can join with many others to make a polymer.

  2. What is a polymer?

    A large molecule made of many monomers joined together.

  3. What are the monomers of carbohydrates?

    Sugars.

  4. Name three carbohydrates made from sugars.

    Starch, glycogen and cellulose.

  5. What are the monomers of proteins?

    Amino acids.

  6. What is a lipid made from?

    One molecule of glycerol and three molecules of fatty acids.

  7. Which enzyme breaks down carbohydrates?

    Carbohydrase, such as amylase.

  8. Which enzyme breaks down proteins?

    Protease.

  9. Which enzyme breaks down lipids?

    Lipase.

  10. What are lipids broken down into?

    Fatty acids and glycerol.

  11. What does the body need to synthesise new molecules?

    Enzymes and energy from respiration.

  12. What is the test for starch?

    Iodine solution turns from orange-brown to blue-black.

  13. What is the test for sugars?

    Benedict's reagent, heated, turns from blue to green, yellow, orange or brick-red.

  14. What is the test for protein?

    Biuret reagent turns from blue to purple.

  15. What is the test for lipids?

    Shake with ethanol, then add water: a cloudy white emulsion.

  16. Three rows of molecules joining, with a pointer marked X to the chain of beads. Name the large molecule marked X and the monomers it is made from.

    A protein. It is a polymer made of amino acids.

  17. Three rows of small molecules joining, with no labels. Name each large molecule and what it is made from. The same diagram with every part labelled.

    Sugars make a carbohydrate. Amino acids make a protein. One glycerol and three fatty acids make a lipid.