BIO 100 UMaine Exam 4 homework with correct answers 100% 2025

BIO 100 UMaine Exam 4 homework with correct answers 100% 2025 DNA replication in prokaryotes differs from replication in eukaryotes for which of these reasons? A. Only eukaryotes produce Okazaki fragments during DNA replicaiton, prokaryotes do not. B. Prokaryotic chromosomes have a single origin of replication, whereas eukaryotic chromosomes have many. C. The rate of elongation during DNA replication is slower in prokaryotes than in eukaryotes. D. Prokaryotes produce Okazaki fragments during DNA replication, but eukaryotes do not. E. Prokaryotes have telomeres, and eukaryotes do not. - Correct Answer B. Prokaryotic chromosomes have a single origin of replication, whereas eukaryotic chromosomes have many. Suppose you are provided with an actively dividing culture of E. coli bacteria to which radioactive thymine has been added. What would happen if a cell divides once in the presence of this radioactive base? A. One of the daughter cells, but not the other, would have radioactive DNA. B. Neither of the two daughter cells would be radioactive. C. All the RNA would be radioactive. D. Radioactive thymine would pair with nonradioactive guanine. E. DNA in both daughter cells would be radioactive. - Correct Answer E. DNA in both daughter cells would be radioactive. An Okazaki fragment has which of the following arrangements? A. primase, polymerase, ligase B. 3' RNA nucleotides, DNA nucleotides 5' C. 5' RNA nucleotides, DNA nucleotides 3' D. DNA polymerase I, DNA polymerase III E. 5' DNA to 3' - Correct Answer C. 5' RNA nucleotides, DNA nucleotides 3' Which enzyme catalyzes the synthesis of a DNA strand in the 5' → 3' direction? A. primase B. DNA ligase C. DNA polymerase III D. topoisomerase E. helicase - Correct Answer C. DNA polymerase III What determines the nucleotide sequence of the newly synthesized strand during DNA replication? A. the nucleotide sequence of the template strand B. the relative amounts of the four nucleotides in the cell C. the particular DNA polymerase catalyzing the reaction D. the primase used in the reaction E. the arrangement of histone proteins hydrogen-bonding to the sugar phosphate backbone - Correct Answer A. the nucleotide sequence of the template strand At a specific area of a chromosome, the sequence of nucleotides below is present where the chain opens to form a replication fork:3' C C T A G G C T G C A A T C C 5' An RNA primer is formed starting at the underlined T (T) of the template. Which of the following represents the primer sequence? A. 5' U G C A A U C C 3' B. 3' G C C T A G G 5' C. 5' A C G T T A G G 3' D. 5' A C G U U A G G 3' E. 5' G C C U A G G 3' - Correct Answer D. 5' A C G U U A G G 3' To repair a thymine dimmer by nucleotide excision repair, in which order do the necessary enzymes act? A. exonuclease, DNA polymerase III, RNA primase B. helicase, DNA polyme