How does the ending of Scene 3 build suspense by using Dramatic Irony?

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Identify the sentence with all words spelled correctly. a. ? it's your responsabilitiy to lock up. b. ? it's your responsability to lock up. c. ? it's your responsabilty to lock up. d. ? it's your responsibility to lock up.

In a series of experiments, hershey and chase radioactively labeled dna and protein in viruses and then used labeled viruses to infect bacteria. hershey and chase's experiments definitively showed that a. dna and not protein is the genetic material. b. dna and protein work together as a cell's genetic material. c. protein and not dna is the genetic material. d. neither dna nor protein act as a cell's genetic material