I left the store yesterday after breakfast. What part of speech is the word
BREAKFAST?
Noun
verb
Adjective
Adverb
Article
Conjunction
Preposition

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