Macromolecules Quiz

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Questions and Answers

What is the most common monosaccharide?

  • Fructose
  • Glucose (correct)
  • Galactose
  • Maltose

What is the difference between starch and cellulose?

  • Starch is largely helical and cellulose molecules are straight and unbranched (correct)
  • Starch is a polymer of fructose and cellulose is a polymer of glucose
  • Starch is straight and unbranched and cellulose is largely helical
  • Starch is a polymer of glucose and cellulose is a polymer of fructose

What is a disaccharide?

  • A reaction that is essentially the reverse of the dehydration reaction
  • A monomer composed of a single sugar
  • A covalent bond between two monosaccharides (correct)
  • A polymer composed of many sugar building blocks

Which polysaccharide is a major component of the tough wall of plant cells?

<p>Cellulose (A)</p> Signup and view all the answers

What is lactose intolerance?

<p>Inability to breakdown lactose in dairy products due to lactase deficiency (B)</p> Signup and view all the answers

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Study Notes

Monosaccharides

  • Glucose is the most common monosaccharide.

Polysaccharides

  • Starch and cellulose are both polysaccharides, but they differ in their glycosidic bonds: starch has α-1,4 bonds, while cellulose has β-1,4 bonds.
  • Cellulose is a major component of the tough wall of plant cells.

Disaccharides

  • A disaccharide is a type of sugar formed by the bonding of two monosaccharides.

Lactose Intolerance

  • Lactose intolerance is a condition in which the body is unable to digest lactose, a disaccharide found in milk, due to a lack of lactase enzyme.

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