During semi-conservative DNA replication, which step must occur first? The hydrogen bonds found between the nitrogenous bases must be broken. RNA must be transcribed. New plasmids must be synthesized. The phosphodiester bonds between the nucleotides must be broken.

During semi-conservative DNA replication, which step must occur first? The hydrogen bonds found between the nitrogenous bases must be broken. RNA must be transcribed. New plasmids must be synthesized. The phosphodiester bonds between the nucleotides must be broken.

Name: During semi-conservative DNA replication, which step must occur first?
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Description: During semi-conservative DNA replication, which step must occur first?The hydrogen bonds found between the nitrogenous bases must be broken.RNA must be transcribed.New plasmids must be synthesized.The phosphodiester bonds between the nucleotides must

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter6: Dna Structure And Function

Section: Chapter Questions

Problem 9SQ

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How does DNA replication occur in a precise manner to ensure that identical genetic information is put into the new chromatid? See Figures 8.12 and 8.13. FIGURE 8.12 In DNA replication, the two polynucleotide strands uncoil, and each is a template for synthesizing a new strand. A replicated DNA molecule contains one new strand and one old strand. This mechanism is called semiconservative replication. FIGURE 8.13 A close-up look at the process of DNA replication. (a) As the strands uncoil, bases are added to the newly synthesized strand by complementary base pairing with bases in the template strand. The new bases are linked together by DNA polymerase. (b) DNA synthesis can proceed only in the 5 3 direction; newly synthesized DNA on one template strand is made in short segments and linked together by the enzyme DNA ligase.
Why is DNA replication called semiconservative?
Which of the following statements BEST describes the process of DNA Replication? Group of answer choices The two strands of the parental molecule separate and serves as template for synthesis of a new strand. Each new strand is identical to its template strand. Each strand of both daughter molecules contains a mixture of old and newly synthesized DNA. The two parental strands reassociate after acting as templates for new strands restoring the parental double helix.
Which of the following statements is/are TRUE for DNA Replication? Two daughter DNAs are formed, each one contains an old and new strands. When the (parent) DNA strands unwind, the 3'→ 5' strand is the leading strand while the 5'→3' strand is the lagging strand. Requires dATP, dTTP, dGTP, dCTP and Mg2+ The replisome is the biological machine responsible in replicating DNA.
. DNA polymerase II (in E. coli) is specialized for which of the following functions? DNA replication, DNA recombination, and DNA repair both DNA repair and DNA replication both DNA replication and DNA recombination DNA replication only DNA recombination only
In what order does initiation of DNA replication proceed (from 1 = first to 4 = last)? DNA polymerase adds nucleotides DNA unwinds at the origin of replication Primase synthesizes RNA primers Helicase opens up replication forks, which extend in both directions
Which of the following steps in DNA replication would occur second? 1.DNA molecule separates into two template strands.2.Complimentary nucleotides are added to each template strand.3.DNA molecule unwinds.4.Two DNA molecules, each with a template strand and a new strand, are formed.
Which of the following replication proteins is incorrectly paired with it’s function? DNA polymerase - adds nucleotides to the growing strand Single stranded binding proteins - hold the DNA strands apart while they are being replicated Ligase - enhances separation of DNA strands Topoisomerase - relieves torsional stress due to unwinding by the DNA Primase - synthesizes a short RNA sequence to initiate replication
Why is replication called semi-conservative? each new molecule of DNA contains one template strand and a newly synthesized one only some of the lagging strand is conserved all strands are conserved except for one strand not all leading strands are conserved
A new DNA strand elongates only in the 5' to 3' direction because _____. replication must progress toward the replication fork DNA polymerase begins adding nucleotides at the 5' end of the template DNA polymerase can add nucleotides only to the free 3' end the polarity of the DNA molecule prevents addition of nucleotides at the 3' end
DNA replication is said to be semiconservative because ___ Synthesis can proceed uninterrupted (as a leading strand) in only one direction Each new DNA strand contains one parent strand and one new strand After each round of DNA replication, the original DNA strands joins None of the above
Which of the following statements about DNA replication is FALSE? Select one: Unwinding of the DNA molecule occurs as hydrogen bonds break. The new strand of DNA is synthesized from 5’ to 3’ direction. Replication occurs as each base is paired with the same base. In eukaryotes, replication can occur at numerous replication bubbles, each with two forks.