BIO 1500 EXAM 5 QUESTIONS AND ANSWERS 100% PASS

BIO 1500 EXAM 5 QUESTIONS AND ANSWERS 100% PASS In his work with pneumonia-causing bacteria and mice, Griffith found that __________. - some substance from pathogenic cells was transferred to nonpathogenic cells, making them pathogenic What is the basis for the difference in how the leading and lagging strands of DNA molecules are synthesized? - dna polymerase can join new nucleotides only to the 3' end of a growing strand In analyzing the number of different bases in a DNA sample, which result would be consistent with the base-pairing rules? - A + G = C + T The elongation of the leading strand during DNA synthesis __________. - depends on the action of DNA polymerase In a nucleosome, the DNA is wrapped around __________. - histones Which of the following sequences in double-stranded DNA is most likely to be recognized as a cutting site for a restriction enzyme? 2100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 1. acca and tggt 2. aaaa and tttt 3. ggcc and ccgg 4. aagg and ttcc 5. agtc and tcag - ggcc ccgg (restriction sites are typically palindromic) E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA replication). DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment? - one low-density and one intermediate-density band A biochemist isolates, purifies, and combines in a test tube a variety of molecules needed for DNA replication. When she adds some DNA to the mixture, replication occurs, but each DNA molecule consists of a normal strand paired with numerous segments of DNA a few hundred nucleotides long. What has she probably left out of the mixture? - DNA ligase 3100% Pass Guarantee Sophia Bennett, All Rights Reserved © 2025 The spontaneous loss of amino groups from adenine in DNA results in hypoxanthine, an uncommon base, opposite thymine. What combination of proteins could repair such damage? - nuclease, DNA polymerase, DNA ligase During Griffith's experiments with Streptococcus pneumoniae in mice, material from _____ bacteria transformed _____ bacteria. - heat-killed virulent ... living nonvirulent Avery and his colleagues' 1944 experiment showed that DNA _____. - was the substance that transformed the bacteria in Griffith's experiment A scientist assembles a bacteriophage with the protein coat of phage T2 and the DNA of phage T4. If this composite phage were allowed to infect a bacterium, the phages produced in the host cell would have _____. - the protein and DNA of T4 In an important experiment, a radioactively labeled bacterioph