Monosaccharides and Their Differences from Aldoses

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Questions and Answers

What type of reaction occurs when two monomers bond together through the loss of a water molecule?

  • Hydrolysis
  • Oxidation
  • Dehydration synthesis (correct)
  • Reduction

Which of the following is a long molecule consisting of many similar building blocks?

  • Polymer (correct)
  • Glycosidic bond
  • Monomer
  • Disaccharide

In which type of bond formation does hydrolysis occur?

  • Glycosidic bond formation
  • Carboxylation
  • Dehydration synthesis
  • Peptide bond formation (correct)

What are enzymes specialized macromolecules that speed up?

<p>Polymer formation reactions (B)</p> Signup and view all the answers

Which of the following is essentially the reverse process of a dehydration reaction?

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

What is the purpose of dehydration synthesis in terms of building macromolecules?

<p>To synthesize polymers by removing water molecules (D)</p> Signup and view all the answers

What are the simplest carbohydrates known as?

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

Which of the following is the most common monosaccharide?

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

How are monosaccharides classified?

<p>By the location of the carbonyl group (B)</p> Signup and view all the answers

Which type of sugar is characterized by having a ketone group in its structure?

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

What is the molecular formula of glucose?

<p>$C6H12O6$ (A)</p> Signup and view all the answers

Which sugar is an intermediate in photosynthesis?

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

What is the main function of monosaccharides in cells?

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

In which form do many sugars exist in aqueous solutions?

<p>Both linear and ring forms (A)</p> Signup and view all the answers

Why are only sugars in the linear form able to reduce other molecules?

<p>Existence of aldehyde group (C)</p> Signup and view all the answers

What is the covalent bond called that joins two monosaccharides in a disaccharide?

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

What type of linkage is present in the synthesis of maltose?

<p>1-4 glycosidic linkage (A)</p> Signup and view all the answers

Why is sucrose considered a non-reducing sugar?

<p>It lacks a free aldehyde group (A)</p> Signup and view all the answers

Which molecule is present in sucrose that prevents it from having a free aldehyde or keto group?

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

What type of linkages determine the architecture and function of a polysaccharide?

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

Where is starch stored in plants?

<p>Within chloroplasts and other plastids (C)</p> Signup and view all the answers

What type of polysaccharide is glycogen?

<p>Storage polysaccharide in animals (D)</p> Signup and view all the answers

What is the main component of the tough wall of plant cells?

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

What are the two ring forms for glucose that determine the difference between starch and cellulose?

<p>Alpha (α) and beta (β) (A)</p> Signup and view all the answers

Why are cellulose molecules straight and unbranched?

<p>Due to the presence of parallel hydrogen bonds between cellulose molecules. (A)</p> Signup and view all the answers

What is the main difference between alpha and beta glucose ring structures?

<p>The configuration of hydroxyl groups at C1 carbon. (A)</p> Signup and view all the answers

Why can enzymes that digest starch not hydrolyze beta linkages in cellulose?

<p>Because cellulose is composed of beta glucose monomers instead of alpha glucose. (A)</p> Signup and view all the answers

What role do microfibrils play in plant cell walls?

<p>Providing structural support and strength. (D)</p> Signup and view all the answers

What is the function of insoluble fiber from cellulose in the digestive tract?

<p>To promote healthy bowel movements. (B)</p> Signup and view all the answers

In what part of arthropods is chitin primarily found?

<p>In the exoskeleton. (A)</p> Signup and view all the answers

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