Carbohydrates: Monosaccharides and Optical Activity
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Questions and Answers

Which of the following statements about monosaccharides is true?

  • Monosaccharides are always aldoses, containing aldehyde groups.
  • Monosaccharides have the empirical formula (CH2O)n where n=1.
  • Monosaccharides can be further hydrolyzed into other saccharides. (correct)
  • Monosaccharides are optically inactive due to their symmetrical structures.

    • What is the molecular formula of a typical monosaccharide?

  • C8H16O8
  • C3H6O3
  • C6H12O6 (correct)
  • C5H10O5

    • Which type of carbonyl group do most monosaccharides contain?

  • Aldehyde groups (correct)
  • Carboxylic acid groups
  • Ester groups
  • Ketone groups

    • What term describes a molecule that can exist in two non-superimposable mirror image forms?

    <p>Enantiomer</p> Signup and view all the answers

    In Fischer projections, which direction does the horizontal line represent?

    <p>Coming out of the plane (towards you)</p> Signup and view all the answers

    How do chiral molecules affect the plane-polarized light?

    <p>They rotate it clockwise.</p> Signup and view all the answers

    Which of the following sugars is an aldotriose?

    <p>Glyceraldehyde</p> Signup and view all the answers

    What term is used to refer to a carbon atom that is bonded to four different atoms or groups?

    <p><strong>Chiral</strong></p> Signup and view all the answers

    $D$-Glucose is an example of which type of monosaccharide?

    <p>Aldose</p> Signup and view all the answers

    Which of the following is true about optical activity in chiral molecules?

    <p>It involves the ability of chiral molecules to rotate plane-polarized light.</p> Signup and view all the answers

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