1 If we compare photosynthesis and cellular respiration
in terms of energy
conversions involved, we observe that in-
A
photosynthesis, carbon dioxide is used to produce energy.
B
photosynthesis, energy is used to produce oxygen.
с
cellular respiration, carbon dioxide is used to produce energy.
D
cellular respiration, energy is used to produce oxygen.

The hershey and chase experiments involved the preparation of two different types of radioactively labeled phage. which of the following best explains why two preparations were required? a. the bacteriophage used in the experiments was a t2 phage. b. it was necessary that each of the two phage components, dna and protein, be identifiable upon recovery at the end of the experiment. c. each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope. d. establishing the identity of the genetic material required observation of two phage generations.