Which of the following statements is TRUEconcerning the synthesis of the leading andlagging strands of DNA in prokaryotic cells?a.O b.The leading strand is synthesized by onepolymerase III continuously, and the laggingstrand is synthesized by several molecules of DNApolymerase III.d.The leading and lagging strands are synthesizedat the same time by the one DNA polymerase I.O c. The leading and lagging strands are synthesizedat the same time by the one DNA polymerase III.The leading strand is synthesized by onepolymerase III, and the lagging strand issynthesized by DNA polymerase I.

DNA replication is a process by which one molecule of DNA is duplicated to 2 molecules of DNA. The…

Answered: Which of the following statements is…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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The experiment below is from a seminal set of experiments in the 1960s that illustrated the role of various repair pathways for DNA damage caused by UV radiation. In this experiment, the scientists isolated E coli strains that are mutant in the Rec A gene, the UvrA gene or both. They then irradiated cultures of each strain with increasing doses of UV light and measured the effect on cell viability. Answer the following questions about this data. A. Which DNA repair pathway and repair activity is inhibited by the Rec A mutant? B. Which DNA repair pathway and repair function is inhibited by UvrA mutant? C. Why is the UvrA/RecA double mutant so much more senitive to UV light than either mutant alone?
Pyrimidine dimers in DNA may be repaired by in E. coli cells. (select all correct answers) Select one or more: O a. photolyase O b. nucleotide excision repair O c. mis-match repair O d. methyl-transferase
Identify the sites of lagging strand synthesis. Select all that are true. B A 5 O a. C O b. D O c. A O d. B
Consider the proteins involved in DNA replication. A. What can a regular DNA polymerase do? Choose one or more. i Catalyze formation of a phosphodiester bond between one dNTP and another dNTP ii Catalyze formation of a phosphodiester bond between one DNA fragment and another iii Catalyze formation of a phosphodiester bond between the 3' end of a DNA fragment, and a dNTP iv Catalyze formation of a phosphodiester bond between the 5' end of a fragment and a dNTP o Open up double-stranded DNA to expose the two separate template strands B. For any ONE action DNA polymerase canNOT do, from the list above, name an enzyme that does that action or makes it unnecessary. Enzyme: What action it does, or makes unnecessary (by numbers given above in part a): i ==>> iv V
What is the real definition of DNA ligase to make it true
DNA polymerase adds nucleotides to Select one: a. the 5′ end, and the leading strand elongates in the 3′ to 5′ direction b. the 3′ end, and the leading strand elongates in the 5′ to 3′ direction c. the 5′ end, and the leading strand elongates in the 5′ to 3′ direction d. the 3′ end, and the leading strand elongates in the 3′ to 5′ direction
Just prior to DNA replication the cytosine in the sequence GTTCATTG is deaminated and it is not repaired before the DNA is replicated. Which of the following is the point mutation you expect in this sequence after the segment has undergone 2 rounds of DNA replication? a. GTTUATTG O b. GTTTATTG C. GTTGATTG d. GGTAATTG e. GTTAATTG
Semiconservative replication of DNA means that: a. both daughter duplexes will be entirely new and the parental duplex will be degraded b. each daughter duplex will have one of the original parental strands and one new strand c. each strand of the daughter duplexes will have parts of the parental strand and parts of the new strand d. one daughter duplex will be entirely new and the other will have both original parental strands
Which of the following types of DNA damage would be hardest to repair using the DNA repair pathways?A. Complete removal of three nucleotides in the middle of one strand.B. A covalent bond between a base on one strand and a base on the complementary strand.C. Incorporation of a sugar other than deoxyribose into one strand.D. Covalent attachment of a short polypeptide to a single base.E. A covalent bond between a base and a deoxyribose on the same strand. Please explain why it's B
Which of the following statements are TRUE?I. DNA replication is a semiconservative process wherein the two resulting double helices consist of one new strand and one parental strand.II. The DNA strand that is used to make a complementary daughter strand is called the parental strand.III. The precursor of each new nucleotide in the DNA strand is a deoxynucleoside 3′-triphosphate.IV. The incoming nucleotide always attaches to 5′-phosphate of the previously added nucleotide a. I only b. II only c. I and IV d. III and IV
a. unwinds the DNA helix b. stabilizes and stops the two strands from annealing (rebinding with each other) c. recoils the DNA d. cleaves both strands of DNA to relieve tension at supercoils e. places RNA primers at their proper location on the template strands f. acts as starting points for DNA polymerase g. adds DNA nucleotides to form new DNA strands h. forms phosphodiester bonds to join Okazaki fragments Esc 1. single-strand binding protein 2. helicase 3. DNA ligase 4. RNA primer 5. gyrase 6. DNA polymerase 53°F Cloudy 3 Q Search $ F5 FR
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