I believe it should be 1. Hope this helps.
To identify the host cell that has taken up the gene of interest
Answer:
For example, cheetahs and lions both feed on the same prey; they compete for this resource. Therefore, if they live in the same area, one or both species will have less food. You might expect them to fight each other over food, but they do not
Explanation:
hope it helps
<span>repressors as well as by transcriptional activators.</span>