Biology: Monomers, Enzymes, and Macromolecules Quiz
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Questions and Answers

What type of reactions involve the formation of a double bond when atoms are removed from a molecule?

  • Oxidation-Reduction reactions
  • Nucleophilic substitution reactions
  • Isomerization reactions (correct)
  • Addition reactions
  • Which type of reactions involve two molecules combining to form a single product?

  • Nucleophilic substitution reactions
  • Oxidation-Reduction reactions
  • Elimination reactions
  • Addition reactions (correct)
  • What are anions or neutral species possessing nonbonding electron pairs called?

  • Isomers
  • Electrophiles
  • Redox agents
  • Nucleophiles (correct)
  • Which reactions involve the transfer of electrons and energy, leading to the gaining or losing of electrons?

    <p>Oxidation-Reduction reactions</p> Signup and view all the answers

    In which type of reaction is one atom or group substituted by another?

    <p>Nucleophilic substitution reactions</p> Signup and view all the answers

    What is formed in elimination reactions?

    <p>Double bond</p> Signup and view all the answers

    What is the role of electrophiles?

    <p>They are easily attacked by nucleophiles</p> Signup and view all the answers

    In oxidation-reduction reactions, what happens to reducing agents?

    <p>They become oxidized</p> Signup and view all the answers

    What type of reaction forms a double bond by removing atoms in a molecule?

    <p>Elimination reactions</p> Signup and view all the answers

    What is the main reason why lipids are not considered polymers?

    <p>They are not composed of monomers that repeat themselves.</p> Signup and view all the answers

    What defines addition reactions?

    <p>Two molecules combine to form a product</p> Signup and view all the answers

    What type of bond is a peptide bond?

    <p>Covalent bond</p> Signup and view all the answers

    Which type of reaction involves the reversible interconversion of aldose and ketose isomers?

    <p>Isomerization reactions</p> Signup and view all the answers

    What role do carbohydrates play in living organisms?

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

    Why are unsaturated fatty acids liquid at room temperature?

    <p>They have double bonds that cause kinks in the chains.</p> Signup and view all the answers

    What characterizes hydration as a reaction?

    <p>A common addition reaction</p> Signup and view all the answers

    Which term describes the type of bonds formed between amino acids in a protein?

    <p>Peptide bonds</p> Signup and view all the answers

    What happens in a nucleophilic substitution reaction involving amino acids?

    <p>The amino group attacks the carbonyl carbon.</p> Signup and view all the answers

    Study Notes

    Biomolecules

    • Monomers are the building blocks of biological macromolecules
    • Examples of biomolecules include carbohydrates, proteins, and lipids
    • Lipids are macromolecules but not polymers, as they are composed of different units (glycerol and fatty acids)

    Carbohydrates

    • Made up of monosaccharides, such as glucose
    • Examples of polysaccharides include cellulose and chitin
    • Functions of carbohydrates include storing energy and serving as structural materials

    Proteins

    • Made up of amino acids
    • Peptide bonds are amide linkages formed through nucleophilic substitution reactions
    • Amino acids have hydrophobic and hydrophilic regions, with a central carbon bonded to an amino group, carboxyl group, and side chain
    • Peptide bonds release water (H2O) during formation

    Lipids

    • Include fatty acids, such as oleic acid (unsaturated)
    • Phosphate groups are present in nucleic acids

    Reactions in Biological Systems

    • Nucleophilic substitution reactions: involve the substitution of one atom or group for another
    • Elimination reactions: involve the formation of a double bond through the removal of atoms or groups
    • Addition reactions: involve the combination of two molecules to form a single product
    • Isomerization reactions: involve intramolecular shifts of atoms or groups
    • Oxidation-Reduction (Redox) reactions: involve the transfer of electrons from a donor (reducing agent) to an electron acceptor (oxidizing agent)

    Enzymes

    • Biological molecules that facilitate chemical reactions
    • Involved in various cellular processes, including metabolism and energy production

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    Test your knowledge on monomers, enzymes, proteins, polysaccharides, and lipids in biology. Understand the structure, function, and differences between saturated and unsaturated lipids.

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