An extinction coefficient for double stranded dna is 0.02 ｵl/[ng*cm]). which preparation would you be comfortable using the 260nm absorbance and this extinction coefficient to calculate the concentration of dna from? what is that concentration in ｵg/ml? why would you be uncomfortable calculating a concentration for the other sample?

The body is protected against harmful flu viruses by

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above

Explain the cellular functions that occur when antibiotics attack a bacteria cell. a. antibiotics target the cell wall, cell membrane, and the processes of protein and nucleic acids production in bacteria to rupture the cell. b. antibiotics create dormant resistant endospores to preserve the genetic material and rupture the cell. c. antibiotics target the cell wall and form a bridge-like connection to form conjugation. d. antibiotics use binary fission to grow twice its size, replications its dna, and split into two cells.