Carbohydrates Classification
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Questions and Answers

What is the characteristic feature of a pyranose?

  • It is a six-membered ring monosaccharide (correct)
  • It is a five-membered ring monosaccharide
  • It is a type of triose
  • It is a type of heptose

What determines the degree of sweetness of various sugars?

  • The number and arrangement of hydroxyl groups in their molecular structure (correct)
  • The number and arrangement of methyl groups in their molecular structure
  • The number of carbon atoms in the sugar molecule
  • The type of ring structure formed by the sugar molecule

What is the name of the simplest sugar?

  • Fructose
  • Glyceraldehyde (correct)
  • Glucose
  • Galactose

What is the term for a five-membered ring monosaccharide?

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

What is the most abundant naturally-occurring carbohydrate?

<p>D-glucose (C)</p> Signup and view all the answers

What is the configuration assumed by pyranose sugars due to the tetrahedral nature of carbon bonds?

<p>Chair or boat (A)</p> Signup and view all the answers

What is the result of the reaction between the C1 aldehyde and C5 -OH in glucose?

<p>Formation of a 6-member pyranose ring (B)</p> Signup and view all the answers

What is the type of ring formed in fructose when the C2 keto group reacts with the OH on C5?

<p>5-member furanose ring (A)</p> Signup and view all the answers

What is the term for the two stereoisomers formed during cyclization of glucose?

<p>Anomeric isomers (B)</p> Signup and view all the answers

What is the characteristic of aldehyde sugars that makes them readily oxidized?

<p>Ability to react with Benedict's reagent (B)</p> Signup and view all the answers

What is the purpose of sugar alcohols in food processing?

<p>To improve the shelf life of food by preventing moisture loss (C)</p> Signup and view all the answers

What is the result of the reduction of sugars?

<p>Yields the sugar alcohols (alditols) (C)</p> Signup and view all the answers

What percentage of sucrose is equivalent to the sweetness of galactose?

<p>33 (A)</p> Signup and view all the answers

What is the classification of oligosaccharides based on the number of monosaccharide units?

<p>Trisaccharide: 3 monomers, Tetrasaccharide: 4 monomers (C)</p> Signup and view all the answers

What are the components of raffinose?

<p>Galactose + glucose + fructose (C)</p> Signup and view all the answers

What is the composition of stachyose?

<p>2 galactoses + glucose + fructose (C)</p> Signup and view all the answers

What is the term for oligosaccharides that are not digestible by humans?

<p>Non-digestible oligosaccharides (NDOs) (A)</p> Signup and view all the answers

What is verbascose composed of?

<p>3 galactoses + glucose + fructose (A)</p> Signup and view all the answers

Which disaccharide is derived from sweet potatoes?

<p>Maltose (B)</p> Signup and view all the answers

What is the relative sweetness of fructose compared to sucrose?

<p>1.73 (C)</p> Signup and view all the answers

Which of the following is NOT a natural source of sucrose?

<p>Milk (C)</p> Signup and view all the answers

What is the bond type between the monosaccharide constituents in cellobiose?

<p>β, (1, 4) (A)</p> Signup and view all the answers

What is the relative sweetness of lactose compared to sucrose?

<p>0.16 (B)</p> Signup and view all the answers

What is the primary function of starch in plants?

<p>Energy storage (D)</p> Signup and view all the answers

Which of the following polysaccharides is classified based on its monosaccharide unit as galactose?

<p>Galactan (B)</p> Signup and view all the answers

What is the term for a polysaccharide chain with a straight chain of monosaccharides?

<p>Linear polysaccharide (C)</p> Signup and view all the answers

What is the primary source of starch in our diet?

<p>Cereals, potatoes, corn, and rice (C)</p> Signup and view all the answers

What determines the functionality of polysaccharides?

<p>The arrangement of monomers in the polysaccharide (A)</p> Signup and view all the answers

What type of polysaccharide is glycogen?

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

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