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6. When two monosaccharides join to make a disaccharide, which type of reaction occurs?

  • A condensation reaction
  • A hydrolysis reaction

7. Which two of these disaccharides are examples of reducing sugars?

  • maltose, lactose
  • maltose, sucrose
  • sucrose, sucrase

8. In alpha glucose, the hydroxyl group (OH) is _____ the plane of the molecule

  • Below
  • Above

9. Which reaction occurs when a disaccharide is broken into two monosaccharides?

  • A hydrolysis reaction
  • A condensation reaction

10. What is the main function of monosaccharides?

  • To provide a store of energy (i.e. starch)
  • To provide energy (i.e. glucose)
  • To provide cell structure (i.e. cellulose)

11. Give two properties of a disaccharide

  • strong, insoluble
  • sweet, soluble
  • sweet, insoluble

12. Which of these is NOT a characteristic of monosaccharides?

  • Water-solubility
  • Insolubility in non-polar substances
  • Solubility in non-polar substances
  • They taste sweet

13. What is a carbohydrate?

  • A group of molecules containing carbon, hydrogen and oxygen
  • A compound containing glycosidic bonds between carbon atoms
  • A compound made up of more than one carbon atom

14. In solution, hexose, pentose and triose sugars exist in what form?

  • In a helix structure
  • Straight chains
  • Ring/cyclic

15. How does the structure of starch (spiral, compact) aid its function?

  • It is insoluble, has no osmotic effect and you can store more of it
  • It lines up to add strength to the molecule

16. Isomers are …?

  • Molecules with the same formula, but whose atoms are arranged differently in space
  • Molecules with a different formula, but whose atoms are arranged in the same way in space
  • Atoms of the same element with different numbers of neutrons and different masses

17. What is the product of beta galactose + alpha glucose?

  • Cellobiose
  • Lactose
  • Maltose

18. What is the product of beta glucose + beta glucose?

  • Cellobiose
  • Lactose
  • Ribose