Bio Exam 4 Pearson Questions and Answers

Bio Exam 4 Pearson Questions and Answers The unpaired nucleotides produced by the action of restriction enzyme are referred to as - Correct Answer️️ -sticky ends What information can not be obtained from the sequence of a gene? - Correct Answer️️ -whether the gene is methylated What is the polymerase chain reaction (PCR)? - Correct Answer️️ -a method to amplify a fragment of DNA Comparison of the sequences of the same gene across species can give some insight into the existence of a common ancestor with that gene. - Correct Answer️️ -true The Taq enzyme is a type of DNA polymerase that allows researchers to separate the DNA strands during the annealing step of the PCR cycle without destroying the polymerase. - Correct Answer️️ -false: require or the denaturation step of PCR How many DNA molecules would there be after four rounds of PCR if the initial reaction mixture contains two molecules? - Correct Answer️️ -32 During which step in the PCR cycle are nucleotides used? - Correct Answer️️ - extension During which step in the PCR cycle do primers form bonds with a single-stranded template? - Correct Answer️️ -annealing How could they obtain sufficient DNA from a tiny sample for an analysis of the ancient human's genes? - Correct Answer️️ -use the polymerase chain reactionSMART PDF cDNA is synthesized from what molecule using an enzyme known as what? - Correct Answer️️ -mRNa reverse transcriptase Gel electrophoresis separates DNA fragments on the basis of what characteristic? - Correct Answer️️ -length Why are yeast cells frequently used as hosts for cloning? - Correct Answer️️ -they are eukaryotic cells Many identical copies of genes cloned in bacteria are produced as a result of which of the following processes? - Correct Answer️️ -plasmid and bacterial cell reproduction The final step in a Sanger DNA sequencing reaction is the run the DNA fragment on a gel. What purpose does this serve? - Correct Answer️️ -it separates DNA fragments generated during the sequencing reaction based on one-nucleotide differences in their size The defense claims that DNA evidence using STR analysis with 13 markers is not sufficient to reliably distinguish between people. What do you think? - Correct Answer️️ -the prosecution is right. STR analysis with 13 markers gives a