Insulin Factory Worksheet
Insulin Factory Blueprint
Name:
Date:
Mission Briefing: Some people's bodies can't make enough insulin, a protein that helps us use sugar for energy. Scientists use Recombinant DNA to turn tiny bacteria into "insulin factories." Follow the steps below to draw how it works!
1
The Plasmid Ring
Bacteria have a circle of DNA called a plasmid. Draw a simple double-lined circle.
2
Molecular Scissors
Redraw your ring, but leave a small gap where "chemical scissors" cut it open.
3
The Human Gene
Draw a small, straight segment of DNA for the insulin "recipe" and shade it in.
4
Genetic Glue
Combine the human gene into the gap in the ring. This is Recombinant DNA!
5
The Insulin Factory at Work
When this new DNA is put back into bacteria, they read the human recipe and start making insulin. Draw a bacterial cell with your new DNA ring inside, surrounded by little "insulin" drops (stars or dots).
Reflect: Why do you think scientists use fast-growing bacteria to make insulin instead of asking humans or animals for it?
Insulin Factory Key Resource
Insulin Factory Key
Teacher Resource
Facilitation guide for the "Genetic Glue" activity. Focus on the core concept: DNA is a universal language that can be swapped between species.
Steps 1 & 2: Plasmids
- Step 1: Look for a continuous circle (plasmid).
- Step 2: Look for a clear gap in the circle.
- Note: Explain that "restriction enzymes" act like chemical scissors that only cut at specific DNA codes.
Steps 3 & 4: Recombination
- Step 3: A distinct DNA segment (the insulin gene).
- Step 4: The human gene is joined to the plasmid.
- Term: This hybrid is "Recombinant DNA." It's the core of modern biotechnology.
The "Big Idea" (Step 5)
Students draw a bacterium containing the recombinant plasmid. The "output" is actual insulin molecules.
Key Concept: DNA is the "software" of life. By changing the software, we can change what the "hardware" (the cell) produces.
Genetic
Reprogramming
Reflection Guide: Why Bacteria?
Efficiency & Speed
Bacteria divide every 20 minutes. A small tank can produce more insulin than thousands of animals in a fraction of the time.
Safety & Purity
Animal insulin is slightly different and can cause allergic reactions. Recombinant insulin is 100% human-identical and safer.
