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Biomolecules I
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Biomolecules I

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Questions and Answers

Which type of bond is formed between two monosaccharides to create a disaccharide?

  • Van der Waals bond
  • Covalent bond (correct)
  • Ionic bond
  • Hydrogen bond
  • What is the main function of polysaccharides in living organisms?

  • Protein synthesis
  • Cell division
  • DNA replication
  • Energy storage (correct)
  • Which type of cells store glycogen as an energy reserve?

  • Muscle cells
  • Liver cells (correct)
  • Red blood cells
  • Nerve cells
  • Where is starch primarily stored as an energy reserve in plants?

    <p>Chloroplasts &amp; other plastids</p> Signup and view all the answers

    What determines the structure and function of a polysaccharide?

    <p>Its sugar monomers and positions of glycosidic linkages</p> Signup and view all the answers

    What is the main cellular function of monosaccharides?

    <p>Main fuels for cellular work</p> Signup and view all the answers

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

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

    What type of glycosidic linkages do cellulose molecules have?

    <p>Beta (β)</p> Signup and view all the answers

    Which polysaccharide is used by insects and crustaceans to build an exoskeleton?

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

    What type of glucose monomer does chitin have with a nitrogen-containing appendage?

    <p>With β linkages</p> Signup and view all the answers

    In starch, which component is somewhat branched?

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

    What type of glucose polymers are helical in structure?

    <p>α glucose polymers</p> Signup and view all the answers

    Which type of carbohydrate is water-insoluble?

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

    What is the major function of lipids according to the text?

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

    Which type of lipid is an important component of the plasma membrane?

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

    What functional group is present in a fatty acid?

    <p>Carboxyl group (COOH)</p> Signup and view all the answers

    Which type of lipid acts as energy-reserving molecules?

    <p>Triglyceride (fats)</p> Signup and view all the answers

    What are the monomers of disaccharides and polysaccharides?

    <p>Glucose, fructose, galactose</p> Signup and view all the answers

    What is the main difference between structural isomers and stereoisomers?

    <p>Structural isomers have the same chemical formula, but different skeleton arrangements, while stereoisomers have the same molecular formula and sequence of bonded atoms.</p> Signup and view all the answers

    Which statement best describes enantiomers?

    <p>Enantiomers are mirror images that are not superimposable on each other.</p> Signup and view all the answers

    What distinguishes an enantiomer from a diastereomer?

    <p>An enantiomer has the same physical properties as its mirror image, while a diastereomer does not.</p> Signup and view all the answers

    Which functional group is present in both glucose and fructose?

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

    How do monosaccharides differ from polysaccharides?

    <p>Monosaccharides are simple sugars consisting of single carbohydrate units, while polysaccharides are complex carbohydrates made up of multiple sugar units.</p> Signup and view all the answers

    Which type of molecule consists of identical or similar building blocks (monomers) linked together?

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

    In terms of stereochemistry, what does it mean for a molecule to be chiral?

    <p>The molecule is non-superimposable on its mirror image.</p> Signup and view all the answers

    What is the term for the process of breaking down a polymer into its monomer units?

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

    Which macromolecule is a polymer made up of amino acid monomers?

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

    In stereochemistry, what term describes molecules that have the same molecular formula but different arrangements of atoms in space?

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

    Which type of molecule consists of thousands of atoms connected covalently?

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

    Which functional group is commonly found in carbohydrates and helps in forming glycosidic bonds between monosaccharides?

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

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