Laboratory Tests: Tollen’s Test and Benedict’s Test
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Questions and Answers

What is the characteristic sign of diabetes when the acetone concentration in the blood increases?

  • Exhalation of volatile acetone (correct)
  • Increase in insulin production
  • Reduction in blood sugar levels
  • Excretion of aromatic aldehydes in urine
  • What is the primary component of the extract of the vanilla bean?

  • Benzaldehyde
  • Cinnamaldehyde
  • Acetone
  • Vanillin (correct)
  • Which aromatic aldehyde is found in Almonds?

  • Benzaldehyde (correct)
  • Vanillin
  • Cinnamaldehyde
  • Acetone
  • Which compound gives cinnamon its flavor and odor?

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

    What functional groups are present in Vanillin?

    <p>Aldehyde, hydroxyl, ether</p> Signup and view all the answers

    Which compound is used more often than natural vanilla extract as a flavoring agent?

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

    What is the purpose of Benedict's test in clinical laboratories?

    <p>To test for the presence of glucose in urine</p> Signup and view all the answers

    What happens to the color of Benedict's reagent when it reacts with a compound containing an aldehyde group?

    <p>It changes from blue to red</p> Signup and view all the answers

    In the Benedict's test, what happens to the copper ion (Cu(II)) present in the reagent?

    <p>It is reduced to copper (I) oxide</p> Signup and view all the answers

    Which functional group gets oxidized during a positive Benedict's test?

    <p>Aldehyde group</p> Signup and view all the answers

    What is the color of the precipitate formed in a positive Benedict's test?

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

    Why is Benedict's test used in the diagnosis of diabetes mellitus?

    <p>To detect the presence of glucose in urine</p> Signup and view all the answers

    Which aldehyde is commonly known as formalin and is used as an effective germicide for disinfection?

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

    Which ketone is noted to be an important product of lipid metabolism in the body and has its concentration increased in certain metabolic diseases like diabetes mellitus?

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

    Which compound is microcidal against all microorganisms, including spores and viruses, and is less irritating to the eyes and skin as compared to formaldehyde?

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

    Which component plays an important role in the metabolism of carbohydrates among the listed compounds?

    <p>Glycer aldehyde</p> Signup and view all the answers

    Which compound should not be used directly in a room with a patient due to its irritating fume?

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

    In which metabolic disease does glucose utilization get inhibited resulting in an increased concentration of acetone in the blood?

    <p>Diabetes mellitus</p> Signup and view all the answers

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