What is the function of DNA primase in DNA replication? O to insert new bases during elongation, using the parent strand as a template to anneal (splice) smaller fragments of DNA to create one continuous strand to create an RNA primer to initiate DNA replication to create replication bubbles by unravelling the par

What is the function of DNA primase in DNA replication? O to insert new bases during elongation, using the parent strand as a template to anneal (splice) smaller fragments of DNA to create one continuous strand to create an RNA primer to initiate DNA replication to create replication bubbles by unravelling the par

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter8: The Structure, Replication, And Chromosomal Organization Of Dna

Section: Chapter Questions

Problem 20QP: What is the function of DNA polymerase? a. It degrades DNA in cells. b. It adds RNA nucleotides to a...

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Replication involves a period of time during which DNA is particularly susceptible to the introduction of mutations. If nucleotides can be incorporated into DNA at a rate of 20 nucleotides/second and the human genome contains 3 billion nucleotides, how long will replication take? How is this time reduced so that replication can take place in a few hours?
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.
Watch this video (http://openstaxcollege.org/l/DNArep) to learn about DNA replication. DNA replication proceeds simultaneously at several sites on the same molecule. What separates the base pair at the start of DNA replication?
What is the importance of complementary base pairing to DNA replication?
Which of the following statements about DNA replication is INCORRECT? It is powered bythe hydrolysis of ATP. Each strand withinthe DNA double helix is used as a template for synthesis of a new strand. It requires that both strands of the double helix be separated from each other. It proceeds withthe addition of new nucleotides to the 3′ end of a growing DNA strand. It begins atmultiple origins of replication sites along eukaryotic chromosomes.
Which 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.
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 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..
What is the correct chronological order of the initiation of DNA replication? A. Hydrogen bonds between complementary base pairs are broken at origin of replication B. Primase binds to the site of origin. C. DNA polymerase binds to the template strand. D. An RNA primer is synthesized. E. Incoming deoxynucleoside triphosphates are added to the growing strand.
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
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
During DNA replication, which of the following steps occurs first? a. synthesis of the leading strand b. synthesis of the lagging strand c. unwinding of the parental DNA duplex d. sealing of the nicks between short DNA e. synthesis of primers