AS Biology 2.1.2 Biological Molecules

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1. What is the main function of monosaccharides?

  • To provide energy (i.e. glucose)
  • To provide cell structure (i.e. cellulose)
  • To provide a store of energy (i.e. starch)
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2. Which of these is NOT a characteristic of monosaccharides?

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

3. How does the structure of cellulose (in straight chains) aid its function?

  • Many polymers in a chain held by hydrogen bonds adds a lot of strength to cell walls supporting turgid cells
  • The straight chains give plant cells more surface area to take up water and minerals

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

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

5. In beta glucose, the hydroxyl group (OH) is ______ the plane of the molecule

  • Above
  • Below


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