Protein Structure Quiz
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Questions and Answers

What is the function of structural proteins?

  • Transport items in and out of cells
  • Bind to foreign substances and target them for destruction
  • Speed up chemical reactions in cells
  • Help cells keep their shape (correct)

    • Which type of protein structure refers to the specific interaction and orientation of subunits?

  • Secondary structure
  • Tertiary structure
  • Quaternary structure (correct)
  • None of the above

    • What do enzymes do in cells?

  • Bind to foreign substances
  • Help maintain cell shape
  • Speed up chemical reactions (correct)
  • Transport items in and out of cells

    • Which type of protein structure consists of alpha helix and beta-sheet patterns?

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

    What is the role of antibodies in the body?

    <p>Bind to foreign substances and target them for destruction (B)</p> Signup and view all the answers

    Which structure combines sections of specific secondary structures along with more random areas?

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

    What is the role of hydrochloric acid in the digestive system?

    <p>Breaking down proteins in the stomach (A)</p> Signup and view all the answers

    Why does the acid from the stomach need to be neutralized when it enters the small intestine?

    <p>To maintain a basic environment for enzyme activity (D)</p> Signup and view all the answers

    What is the main function of enzymes in biochemical reactions?

    <p>Breaking down macromolecules (B)</p> Signup and view all the answers

    Which type of carbohydrates end with an '-ose' suffix?

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

    What is the stoichiometric formula for carbohydrates?

    <p>(CH2O)n (D)</p> Signup and view all the answers

    Why do carbohydrates crystallize with difficulty?

    <p>As a result of hydrogen bonding with water (C)</p> Signup and view all the answers

    Which enzyme type assists in the transportation of functional groups between molecules?

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

    What is the main function of Ligases enzymes?

    <p>Formation of an isomer of a compound (A)</p> Signup and view all the answers

    What is the role of an inhibitor in enzyme function?

    <p>Prevent the chemical reaction (B)</p> Signup and view all the answers

    What is the function of an active site on an enzyme?

    <p>Bind to substrates and initiate the reaction (A)</p> Signup and view all the answers

    Which term describes a molecule that facilitates a chemical reaction but is not consumed by it?

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

    What happens when an inhibitor binds to an enzyme?

    <p>The reaction is impeded or slowed down (B)</p> Signup and view all the answers

    What is the general formula for saturated fatty acids?

    <p>CnH2n+2 (C)</p> Signup and view all the answers

    Which type of fatty acids are chemically more reactive and prone to rancidity?

    <p>Polyunsaturated fatty acids (A)</p> Signup and view all the answers

    What is the primary function of natural waxes in nature?

    <p>As a coating to protect from dehydration and predators (B)</p> Signup and view all the answers

    In phospholipids, which group is the negatively-charged polar head?

    <p>The phosphate group (D)</p> Signup and view all the answers

    What type of reaction is characteristic of unsaturated hydrocarbons?

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

    What class of saponifiable lipids are formed from the reactions of glycerol with 3 equivalents of fatty acids?

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

    What role do inhibitors play in the body?

    <p>Slowing down or turning off reactions (B)</p> Signup and view all the answers

    Which type of inhibition involves molecules that store information for cellular growth and reproduction?

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

    What are the bases found in RNA according to the text?

    <p>A, C, G, U (B)</p> Signup and view all the answers

    What is the pentose sugar in DNA?

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

    In DNA and RNA, which molecule consists of long chains of monomers called nucleotides?

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

    What does RNA polymerase do during transcription?

    <p>Copies DNA into RNA (C)</p> Signup and view all the answers

    What is the function of ribosomal RNA (rRNA)?

    <p>Make up ribosomes where protein synthesis occurs (B)</p> Signup and view all the answers

    What involves the synthesis of mRNA from a gene on a DNA strand?

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

    What does the genetic code consist of?

    <p>Sets of three bases along the mRNA (D)</p> Signup and view all the answers

    What does the genetic code determine according to the text?

    <p>Amino acid order for the protein (D)</p> Signup and view all the answers

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