A student writes down a plan to make a bacterium produce a protein of a plant…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A student writes down a plan to make a bacterium produce a protein of a plant.
- Isolate the plant gene.
- Cross the plant with another plant, so that its offspring carry the gene.
- Put the gene into the bacterium.
- As soon as the gene is inside the bacterium, the work is finished.
Which two lines are wrong? Correct each of them in one sentence.
Need a reminder? The key ideaShow
Genetic engineering changes the genetic material and puts it into a host. Bioprocess engineering keeps the culture free from germs and grows it in large amounts. A culture that doubles every minutes holds cells after minutes.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. A plan of four lines.
Plan. Compare each line with the three basic steps: identify the DNA, introduce it into a host, maintain it in the host and its offspring.
Step 1. Line 1 is right. It is the first basic step, to identify and isolate the DNA with the wanted gene.
Step 2. Line 2 is wrong. A cross between plants moves whole sets of genes between plants. It does not put a gene into a bacterium. The gene has to be put into the host by the methods of recombinant DNA technology.
Step 3. Line 3 is right. It is the second basic step.
Step 4. Line 4 is wrong. The third step is to maintain the gene in the host and pass it on to its offspring. The gene must be copied each time the bacterium divides.
Answer: Lines 2 and 4 are wrong.
Check. Lines 1 and 3 agree with the first two basic steps. Line 4 ignores the third.
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