Using terms from the list below, fill in the blanks in the following brief description of the experiment with Streptococcus pneumoniae that identified which biological molecule carries heritable genetic information

Question

Some terms may be used more than once.

Cell-free extracts from S-strain cells of S. pneumoniae were fractionated to __________________ DNA, RNA, protein, and other cell components. Each fraction was then mixed with __________________ cells of S. pneumoniae. Its ability to change these into cells with __________________ properties resembling the __________________ cells was tested by injecting the mixture into mice. Only the fraction containing __________________ was able to __________________ the __________________ cells to __________________ (or __________________ ) cells that could kill mice.

carbohydrate lipid R-strain
DNA nonpathogenic RNA
identify pathogenic S-strain
label purify transform


Fill in the blank(s) with correct word

Answer 1

Cell-free extracts from S-strain cells of S. pneumoniae were fractionated to purify DNA, RNA, protein, and other cell components. Each fraction was then mixed with R-strain cells of S. pneumoniae. Its ability to change these into cells with pathogenic properties resembling the S-strain cells was tested by injecting the mixture into mice. Only the fraction containing DNA was able to transform the R-strain cells to pathogenic (or S-strain) cells that could kill mice.