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Questions and Answers

Det funktionelle enzym kaldes

  • Holoenzym (correct)
  • Apoenzym
  • Prostetisk gruppe
  • Hvad er sandt om en sur aminosyre?

  • Den har en phenylring i sidekæden
  • Den har en primær amin i sidekæden
  • Den har en carboxylsyregruppe i sidekæden (correct)
  • Actin filamentet er involveret i

  • DNA syntese
  • Bevægelse af celler (correct)
  • Cellens plasmamembran
  • Cellens organeller kan bevæge sig via

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

    Cellens membran består primært af

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

    Nmol/min kan være enheden for

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

    Et allosterisk enzym adskiller sig fra et Michaelis-Menten enzym ved

    <p>At andre molekyler end substrat og produkt kan påvirke enzymets aktivitet</p> Signup and view all the answers

    Exocytose kan beskrives som

    <p>En mekanisme til at frisætte molekyler fra en celle</p> Signup and view all the answers

    Endosomer står for

    <p>Nedbrydning af proteiner</p> Signup and view all the answers

    Intermediate filaments

    <p>Giver cellen mekanisk styrke</p> Signup and view all the answers

    The fluid mosaic model taler man om i forbindelse med

    <p>Cellens membran</p> Signup and view all the answers

    Hvilket af følgende udsagn er korrekt om phospholipider?

    <p>De består bl.a. af to fedtsyrekæder</p> Signup and view all the answers

    Transport af vesikler mellem ER og Golgiapparatet kræver involvering af

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

    Hvilket af følgende organel står for at producere kemisk energi i form af ATP?

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

    Hvilken af følgende er en aminosyre?

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

    Hvilken af følgende aminosyrer er polær?

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

    Et transportsystem der kan transportere et molekyle, A, i begge retninger afhængig af gradienten er

    <p>Uniport i forhold til A</p> Signup and view all the answers

    Hvis transporten af molekyle A er koblet til Na+-gradienten, er transporten

    <p>Ikke energikrævende</p> Signup and view all the answers

    Molekyle A transporteres via et Na+-koblet transportsystem, og A og Na+ transporteres antiport ift. hinanden. Hvilket af følgende udsagn er korrekt i dette tilfælde?

    <p>A transporteres ud ad cellen</p> Signup and view all the answers

    Hvilket af følgende er en second messenger?

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

    Et G protein finder man i forbindelse med

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

    Enzymer virker ved at

    <p>Mindske aktiveringsenergien for en given reaktion</p> Signup and view all the answers

    Hvilken af nedenstående interaktioner er generelt vigtigst for foldningen af vandopløselige proteiner?

    <p>Dannelse af hydrogenbindinger</p> Signup and view all the answers

    Hvilken kemisk forskel er der imellem DNA og RNA mhp. på sukkerdelen?

    <p>DNA har et H-atom i 2' positionen</p> Signup and view all the answers

    Hvilke interaktioner stabiliserer en alfa-helix?

    <p>Hydrogenbindinger i proteinets backbone</p> Signup and view all the answers

    Under DNA replikation udfører ligase en yderst vigtig funktion; hvilken enzymatisk reaktion katalyserer ligasen?

    <p>Kovalent binding imellem Okazaki fragmenter</p> Signup and view all the answers

    Study Notes

    Multiple Choice - Detaljer Study Notes

    • Enzymer:
      • Function: Enzymes decrease the activation energy for a reaction
      • Holoenzyme: The complete, active enzyme
      • Apoenzyme: The protein portion of an enzyme
      • Prosthetic group: Non-protein parts of some enzymes
    • Amino Acids:
      • Some amino acids have a side chain with a carboxyl group, making them acidic.
      • The side chain can contain an amino group, making the amino acid basic.
      • Some amino acid side chains contain a phenyl ring
    • Actin Filaments:
      • Involved in cell movement.
    • Cellular Organelles:
      • Mitochondria: Produce ATP (cellular energy)
      • ER (Endoplasmic Reticulum): Involved in protein synthesis and transport
      • Endosomes: Involved in protein degradation and sorting
      • Golgi-apparatet: Involved in protein modification and sorting
      • Lysosomes: Involved in the breakdown of molecules
      • Cytoskeleton: Maintain cell shape and structure, and support cell movement
    • Phospholipider:
      • Key component of cell membranes
      • Consist of a glycerol backbone, phosphate group, and two fatty acid chains.
    • Enzyme Types:
      • Allosteric Enzymes: Regulation of activity by molecules other than the substrate.
      • Can be regulated by molecules other than substrate
    • Exocytosis:
      • Process where molecules are released from a cell
    • Transport:
      • Molecules can be transported across cell membranes via various processes, including active and passive transport.
    • Intermediate Filaments:
      • Provide mechanical strength to cells
    • Second Messenger:
      • Small molecules that relay signals in the cell
    • DNA and RNA Structure:
      • Differences in the structure of DNA and RNA affect their function.
      • Sugar molecules (ribose vs. deoxyribose) and specific bases

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