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ABC Transporters quiz

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  • What does ABC stand for in ABC transporters?
    ABC stands for ATP Binding Cassette.
  • What type of transport do ABC transporters perform?
    ABC transporters perform primary active transport.
  • How many transmembrane domains do ABC transporters have?
    ABC transporters have two transmembrane domains (TMDs).
  • What is the function of the nucleotide binding domains (NBDs) in ABC transporters?
    NBDs bind and hydrolyze ATP to provide energy for transport.
  • What is the main structural motif found in ABC transporters?
    The ATP binding cassette motif is the main structural motif.
  • What direction do ABC transporters move substances across the membrane?
    They move substances from low concentration to high concentration, against the gradient.
  • What are MDR transporters and why are they important?
    MDR (multidrug resistance) transporters confer resistance to multiple drugs, impacting antibiotic resistance and cancer treatment.
  • How do ABC transporters contribute to antibiotic resistance in bacteria?
    They pump antibiotics out of bacterial cells, making the bacteria resistant.
  • What human protein is an MDR transporter that removes anticancer drugs from tumor cells?
    P-glycoprotein (PGP) is an MDR transporter in humans.
  • Why is research on MDR transporters significant in medicine?
    Because MDR transporters affect antibiotic resistance and cancer drug effectiveness, making them crucial for medical research.
  • What symbol is used in the lesson to highlight important concepts for medical students?
    A stethoscope symbol is used to highlight important concepts.
  • Where are the nucleotide binding domains located in ABC transporters?
    They are located on the cytosolic side of the cell membrane.
  • What do ABC transporters use as an energy source for transport?
    They use ATP as an energy source.
  • What types of substances can ABC transporters remove from cells?
    They can remove toxins and drugs from cells.
  • How do ABC transporters create a pore for molecule transport?
    Their transmembrane domains span the membrane, forming a pore for transport.