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York College CUNY Bio 301Sp2021B Final Exam B May 24 NAME wayat 27 Multiple Choice 1 pt each 9 Short Answer 2 pt each 36 Q total 45 pts answer all as on Exam 4 1 The best description of lysogeny by temperate bacteriophage is A mobile segments of DNA B tiny RNA molecules that infect plants C viral DNA integrates into the host genome D misfolded form of normal brain protein E DNA methylation a defense for bacteria against bacteriophage infection 2 The Covid19 genome is detected in a nasal swab from an infected patient by A microarray analysis B Northern blotting C Western blotting D Southern blotting E RT PCR 3 best explains the reliance on combination drug therapy A Viral genes turn the host cell into a lambda producing factory B Mutations are introduced into the HIV 1 genome by error prone RT C The phage genome replicates along with the host genome D Provirus enters the host genome switching to the lysogenic cycle E Prophage DNA is incorporated by homologous recombination into host cell ribosomal RNA Introns are removed from pre mRNA by A signal recognition particle B mediator protein complex C arbitrator aggregate D the spliceosome E dicer 5 In recombinant DNA technology transformant refers to A the enzyme that cuts DNA into fragments B the sticky ends of an RNA fragment C antibiotic resistant colony D a plasmid used to carry insert lipid into a host cell E the enzyme that covalently joins insert to vector 6 Scrapie mad cow and Creutzfeld Jacob disease are all caused by A C vibrio B Influenza virus C Covid 19 D HIV 1 polyprotein E Prion proteins 7 Specific DNA segments obtained using PCR and a primer pair are A replicons B amplicons C exons D spliceosomes E introns

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