Microbiology Final - Barbosa (test 4) Questions And Answers Already Graded A+

virus's ability to infect an animal cell depends primarily upon the - ️️presence of receptor sites on the cell membrane a mutation that inactivates the gene that expresses the repressor of the lac operon results in - ️️continuous transcription of the structural genes Continuous cell lines differ from primary cell lines in that - ️️continous cell lines can be maintained through an indefinite number of generations which of the following is not a product of transcription? - ️️a new strand of DNA If the sequence of amino acids encoded by a strand of DNA is serine-alanine-lysineleucine, the coding for the sense strand of DNA is - ️️3' AGACGTTTCAAT the anticodon for valine is - ️️CAA what type of mutation will occur if the codon UCG is replaced with UCU in the sequence shown below? UUA-GCA-AAG-UCG - ️️silent mutation Both base substitution and frameshift mutations can result in the formation of premature stop codons. - ️️true in an operon, the switch that controls mRNA synthesis is the promotor, which is a sequence of bases upstream from the first structural gene - ️️false which of the following pairs is mismatched? - ️️RNA polymerase - makes a molecule of RNA from an RNA template which of the following statements is false? - ️️DNA replication proceeds in only one direction around the bacterial chromosome how do all viruses differ from bacteria? - ️️viruses are not composed of cells which of the following statements is not true of lysogeny - ️️it causes lysis of host cellswhich of the following places these items in the correct order for DNA-virus replication? - ️️DNA synthesis, transcription, translation, maturation which of the following statements about viruses is false? - ️️viruses always use their own catabolic enzymes some viruses, such as human herpesvirus 1 (simplexvirus), infect a cell without causing symptoms for long time. These are called - ️️latent viruses