If the template strand of DNA has the sequence 5'AATGCCTATA3', the MRNA sequence that is transcribed will be OA 5TTACGGATAT3' B 5'UUACGGAUAU3' OC 5'UAUAGGCAUU3' OD.5'TATAGGCATT3'
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- The initial mechanism for repairing nucleotide errors in DNA is _____. a. mismatch repair b. DNA polymerase proofreading c. nucleotide excision repair d. thymine dimersWhich of the following statements about the DNA replication is false? a. Synthesis of the new DNA strands is form 39 to 59 b.Synthesis of the new DNA strands is from 59 to 39 c. DNA Unwinds, primase adds RNA primer, DNA polymerases synthesize the new strand and remove the RNA primer d. Many initiation points exist in each eukaryotic chromosome. e. Okazaki fragments are synthesized in the opposite direction from the direction in which the replication for moves.DNA replication is described as semi-conservative because _____. A. one leading strand and one lagging strand are produced in DNA replication B. all new DNA strands are synthesized continuously C. one new DNA strand is synthesized discontinuously D. DNA replication can never produce DNA molecules which consist of both original DNA stands E. one DNA strand is the template while the complementary strand is not
- Which of the following statements about replication is false? The proofreading function of DNA polymerases involves 3’ 5’ exonuclease activity. Origins of replication are rich in G-C nucleotide pairs. A characteristic of aging cells is that telomeres become shorter. The lagging strand is synthesized in the opposite direction as the movement of the replication fork. DNA polymerase is more accurate that RNA polymerase.Arrange the following events of DNA replication in the proper order. A. DnaA binds DNA B. DNA polymerase binds to a free 3’ – OH C. Topoisomerases act D. Ori “melts/denatures”The elongation of leading strand during DNA synthesis a. progresses away from the replication fork. b. occurs in the 3'-5' direction c. does not require a template strand d. depends on the action of DNA polymerase
- Which of the following is not a feature of eukaryotic DNA replication? a. Replication bubbles move in opposite directions.b. A new strand is synthesized using an old one as a template.c. Complementary base pairing determines which nucleotides will be added to the new strand.d. Each chromosome has one origin of replication.At a growing replication fork, the replication of the two strands is: Question 15 options: continuous for the leading strand and discontinuous for the lagging strand. continuous for the lagging strand and discontinuous for the leading strand. uncoupled and independent of each other. discontinuous for both strands due to low processivity of the DNA polymerase.For the statements below, indicate whether the statement applies to the leading strand, or to the lagging strand, or to both. a. synthesized in the 5'→3' direction b. synthesized continuously c. require(s) DNA ligase to join fragments d. described as a daughter strand e. synthesized in the same direction as the movement of the replication fork f. DNA polymerase is the enzyme involved in forming this polynucleotide.
- Which of the following is NOT true of DNA replication? a. Helicase uses ATP as an energy source. b. Primase uses ATP to build primers. c. Single-stranded binding proteins are enzymes that hold the strands open. d. Telomerase adds nucleotides to the original DNA template. e. Ligase uses a condensation reaction to make a single phosphodiester bond at each site of ligation..The elongation of the leading strand during DNA synthesis(A) progresses away from the replication fork.(B) occurs in the 3′ S 5′ direction.(C) produces Okazaki fragments.(D) depends on the action of DNA polymeraseWhich of the following is not a true statement comparing prokaryotic and eukaryotic DNA replication? a. Both eukaryotic and prokaryotic DNA polymerases build off RNA primers made by primase. b. Eukaryotic DNA replication requires multiple replication forks, while prokaryotic replication uses a single origin to rapidly replicate the entire genome. c. DNA replication always occurs in the nucleus. d. Eukaryotic DNA replication involves more polymerases than prokaryotic replication.