Starches and Glycogen in Biology
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Questions and Answers

What is the primary function of starch in plants?

  • To convert glucose into glycogen
  • To store energy for the plant (correct)
  • To break down glucose molecules
  • To provide energy for the plant through photosynthesis
  • What is the chemical formula of the starch molecule?

  • (C6 H12 O6)
  • (C12 H22 O11)
  • (C6 H10O5) (correct)
  • (C3 H8 O3)
  • What is the difference between amylose and amylopectin, the two polymers that make up starch?

  • Amylose is linear, while amylopectin is branched (correct)
  • Amylose is made up of glucose units, while amylopectin is made up of fructose units
  • Amylose is branched, while amylopectin is linear
  • Amylose is a storage form of energy, while amylopectin is a structural component
  • How does the human body utilize the starch obtained from plant sources?

    <p>The body breaks down the starch molecules into glucose, which is the body's primary fuel source</p> Signup and view all the answers

    What is the role of the enzyme amylase in the digestion of starch?

    <p>Amylase breaks down the 1,4 glycosidic bonds in amylose and amylopectin, converting starch to glucose</p> Signup and view all the answers

    What is the primary source of starch in the human diet?

    <p>Plant sources, such as grains, vegetables, and tubers</p> Signup and view all the answers

    What is the main difference between amylose and amylopectin in terms of structure?

    <p>Amylose has a linear structure, while amylopectin is branched.</p> Signup and view all the answers

    Why does amylopectin have more accessible ends compared to amylose?

    <p>Due to the presence of occasional 1,6 glycosidic bonds.</p> Signup and view all the answers

    What distinguishes waxy starches from regular starches?

    <p>Waxy starches contain 100% amylopectin.</p> Signup and view all the answers

    How does the size of starch granules affect their thickening ability?

    <p>Larger granules can swell more and therefore thicken more effectively.</p> Signup and view all the answers

    What factor influences the gelatinization temperature range for starches?

    <p>The percentage of amylopectin and amylose in the starch composition.</p> Signup and view all the answers

    How does stirring affect the gelatinization process of starch?

    <p>Agitation during stirring can cause premature rupture of starch granules.</p> Signup and view all the answers

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