BIO SQUARECAP SATA EXAM 4 | 50 Questions with 100% Correct Answers | Updated & Verified

The extract from a heat-killed S-strain of Streptococcus pneumoniae was treated with following enzymes. I. DNase II. RNase III. Protease The treated extract was mixed with a non-pathpgenic R-strain and used to infect mice. Which of the following treatments will not result in pneumonia in the treated mice? - DNase treated If an RNA virus such as COVID -19 labeled with radioactive sulfur was allowed to infect nonradioactive bacteria and replicate. Then the cells were centrifuged to separate the virus from bacteria. Which fraction will contain the highest radioactivity? - Protein coat of virus in the supernatant In an analysis of the nucleotide composition of a double stranded DNA to see which bases are equivalent in concentration, which of the following would be true? - A + C = G + T only