What is the point at which dna strand is unzipped so that it can form new complimentary strands?

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

Approximately percent of the energy created by cell metabolism is used by the body to carry on its normal functions, such as respiration, digestion, reproduction, muscular movement, circulation, and cellular regrowth.

Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic