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Gel electrophoresis

Quiz by Zhao

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27 questions
Show answers
  • Q1
    What does gel electrophoresis separate based on?
    Size and charge
    Only charge
    Shape
    Only size
    30s
  • Q2
    What is the charge of DNA?
    Neutral
    It depends on the molecule
    Negative
    Positive
    30s
  • Q3
    Which direction do DNA fragments move in gel electrophoresis?
    Towards the positive electrode
    In random directions
    Towards the negative electrode
    They do not move
    30s
  • Q4
    What makes DNA fragments move during gel electrophoresis?
    Centrifugal force
    Heat
    An electric current
    Magnetic force
    30s
  • Q5
    What is used as a reference to compare DNA fragment sizes in gel electrophoresis?
    An enzyme
    A plasmid
    A DNA ladder
    A restriction enzyme
    30s
  • Q6
    What is the main component of gels used in DNA electrophoresis?
    Cellulose
    Acrylic
    Agarose
    Gelatin
    30s
  • Q7
    How do smaller DNA fragments behave in gel electrophoresis?
    They accumulate at the wells
    They move faster
    They do not move
    They move slower
    30s
  • Q8
    Where are DNA samples placed in the gel?
    In the middle of the gel
    At the negative end
    At both ends
    At the positive end
    30s
  • Q9
    What happens to the largest DNA fragments during electrophoresis?
    They stay in the middle
    They move quickly
    They stay near the wells
    30s
  • Q10
    What is used to visualize DNA on the gel?
    Infrared light
    Ultraviolet light
    X-ray
    Visible light
    30s
  • Q11
    What is the purpose of the buffer solution in gel electrophoresis?
    To conduct the electric current
    To neutralize DNA charge
    To stain the DNA
    To maintain temperature
    30s
  • Q12
    What does a DNA band represent?
    A mixture of all DNA fragments
    A group of same-sized DNA fragments
    A single DNA fragment
    A small section of DNA
    30s
  • Q13
    What does a DNA ladder consist of?
    DNA fragments of known sizes
    Randomly sized DNA fragments
    A mixture of proteins
    DNA fragments from a single species
    30s
  • Q14
    Which type of DNA fragment moves the least during electrophoresis?
    No fragments move
    Large fragments
    Small fragments
    Medium fragments
    30s
  • Q15
    What is the purpose of adding a DNA-binding dye?
    To make DNA visible
    To neutralize the charge
    To separate proteins
    To speed up the movement
    30s

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