We Value Your Privacy

We and our partners use technology such as cookies on our site to personalise content and ads, provide social media features, and analyse our traffic. Click below to consent to the use of this technology across the web. You can change your mind and change your consent choices at anytime by returning to this site.

Update Consent
Loading ...

How Would You Use a Balloon to Model Bacteria?

Updated July 20, 2017

Creating a physical model of a biological concept -- especially microscopic organisms -- can make an abstract idea easier to understand, like balloons made to look like bacteria. Students can play with the bacteria, interact with them and use them for projects exploring where bacteria live, how they divide and what kills them.

Loading ...
  1. Fill balloons with coloured water. This represents the cytoplasm. Before sealing the balloon, include two rubber bands twisted together to represent a DNA plasmid, a large cotton ball to represent the nucleoid and some glitter to represent the ribosomes. Don't completely fill the balloons; you don't want them taut.

  2. Attach a ribbon to one end of the balloon to represent the flagellum of the bacteria.

  3. Attach coloured tissue paper to the outside of the balloon with glue to represent Gram-positive bacteria.

  4. Attach short strips of small ribbon to the outside of the balloon to represent the bacteria's pili.

  5. Twist one of the elongated balloons in half to show a bacteria that's in the process of dividing.

  6. Use graduated colours of balloons and arrange the colours in concentric circles to show generations of bacteria as it spreads out from the centre of the colony.

  7. Attach the balloons to something like cardboard to represent the substrate on which they grow. This substrate can be decorated according to context. If the presentation will be held regarding bacterial contamination of meat, make the cardboard look like a piece of meat by colouring it red and giving it striations. The balloons should indent when pressed together.

  8. Tip

    Consider using the types of elongated balloons often used for balloon animals, especially when representing E. coli. To represent apoptosis, pop the balloons. To represent necrosis, deflate the balloons.

Loading ...

Things You'll Need

  • Balloons
  • Cotton balls
  • Rubber bands
  • Coloured tissue paper
  • Large ribbon
  • Small ribbon
  • Cardboard
  • Glitter
  • Food colouring
  • Tape
  • Glue

About the Author

Sarah Parrish is a writer based in Heidelberg, Germany. She has contributed to websites such as 1H2O, where she won an award in citizen journalism. Parrish has also coauthored publications in scientific journals and received her bachelor's degree in psychology from the University of Oregon.

Loading ...