Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 8, Problem 11SQ
The phrase "5 prime to 3 prime" refers to the ______.
- a. timing of
DNA replication - b. directionality of DNA synthesis
- c. number of phosphate groups
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The statement “DNA replicates by a semiconservative mechanism” means that (a) only one DNA strand is copied (b) first one DNA strand is copied and then the other strand is copied (c) the two strands of a double helix have identical base sequences (d) some portions of a single DNA strand are old and other portions are newly synthesized (e) each double helix consists of one old and one newly synthesized strand
DNA strands are anti-parallel and DNA polymerase can only synthesize DNA in a 5' to 3' direction. How does the enzyme synthesize both strands at the same time?
A. The leading strand is sythesised in Okazaki fragments
B. The lagging strand is synthesised in short Okazaki fragments.
C. Only one strand is replicated.
D. There are more than one DNA polymerase involved.
(a) What is the function of helicase in DNA replication?(b) What is the function of DNA polymerase?(c) What are replication forks? Compare and contrast leading and lagging strands.
Answer all please
Chapter 8 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 8 - HersheyChase Experiments The graph shown in FIGURE...Ch. 8 - HersheyChase Experiments The graph shown in FIGURE...Ch. 8 - HersheyChase Experiments The graph shown in FIGURE...Ch. 8 - HersheyChase Experiments The graph shown in FIGURE...Ch. 8 - HersheyChase Experiments The graph shown in FIGURE...Ch. 8 - Which is not a nucleotide base in DNA? a. adenine...Ch. 8 - What are the base-pairing rules for DNA? a. AG, TC...Ch. 8 - Similarities in ________ are the basis of...Ch. 8 - One species DNA differs from others in its _____....Ch. 8 - In eukaryotic chromosomes, DNA wraps around...
Ch. 8 - The chromosome number ______. a. refers to a...Ch. 8 - Prob. 7SQCh. 8 - When DNA replication begins, ______. a. the two...Ch. 8 - Which of the following is/are not required for DNA...Ch. 8 - Energy that drives the attachment of a nucleotide...Ch. 8 - The phrase "5 prime to 3 prime" refers to the...Ch. 8 - After DNA replication, a eukaryotic chromosome...Ch. 8 - Match the terms appropriately. ______...Ch. 8 - All mutations ________. a. result from radiation...Ch. 8 - Prob. 15SQCh. 8 - Determine the complementary strand of DNA that...Ch. 8 - Review Figures 8.12 and 8.13. In cells, the...Ch. 8 - Woolly mammoths have been extinct for about 4,000...Ch. 8 - Xeroderma pigmentosum is an inherited disorder...
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- The phrase 5to3 refers to the _________ . a. timing of DNA replication b. directionality of DNA synthesis c. number of phosphate groupsarrow_forwardDNA replication begins... A. At the origin of replication B. At the 5' end of the DNA strand C. At the centromeres where sister chromatids are connected D. At the start codonarrow_forwardIn the dideoxy-sequencing reaction, what terminates DNA synthesis at a particular base? a. The absence of a base on the ddNTP halts the DNA polymerase. b. The ddNTP causes a break in the sugar–phosphate backbone. c. DNA polymerase will not incorporate a ddNTP into the growing DNA strand. d. The absence of a 3′-OH group on the ddNTP prevents the addition of another nucleotide.arrow_forward
- Why is DNA replication called semiconservative? A. Both daughter strands are entirely new B. Each daughter duplex contains one strand from the parent structure and one new strand C. Each daughter duplex will contain parts of the parental strand in each strand. D. None of these is the correct answer.arrow_forwardThe replication of chromosomes by eukaryotes occurs in a relatively short period of time because ? a. The eukaryotes have more amount of DNA for replication b. The eukaryotic replication machinery is 1000 times faster than prokaryotes c. Each chromosome contains multiple replicons di ba ito? Same eto d. Eukaryotic DNA is always DNA strandedarrow_forwardIn DNA replication, the role of topoisomerase is to Question 11 options: a) "unzip" the double stranded DNA in front of DNA polymerase. b) maintain the single stranded DNA. c) supercoil the DNA after the replication fork has passed. d) relieve supercoil tension in the DNA in front of the replication fork.arrow_forward
- Refer to Figure 2 and compare this with the DNA model in Figure 1. a. In what ways are they similar? b. In what ways are they different? c. What is the biological significance of such differences? Why is the DNA referred to as the genetic material?arrow_forwardWhen two adjacent bases in the same strand of DNA dimerize (form a covalent bond between them), what happens to the DNA? a. the original strand of DNA now contains a new DNA sequence b. the original strand of DNA is prevented from opening during replication, so this section of DNA will not be replicated c. the original strand of DNA is methylated, which causes the bases to mismatch d. the original strand of DNA is kinked, which prevents DNA polymerase from working properly e. the original strand of DNA is unaffected, so no additional mutations arisearrow_forwardA drug that inhibits the DNAa protein is added to a culture of E. coli cells. What is the first step of DNA replication that will be impaired by this drug? PICK ONE ANSWER: A. Keeping parent DNA strands separated B. Releasing tension generated by supercoiling C. Activating the origin of replication D. Making primers E. Forming phosphodiester bondsarrow_forward
- 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 polymerasearrow_forwardDNA replication is said to be semiconservative because a. one of the new molecules conserves both of the original DNA strands. b. the new DNA molecule contains two new DNA strands. c. both of the new molecules contain one new strand and one old strand. d. DNA polymerase conserves both of the old strands.arrow_forwardThe following diagram represents a DNA molecule that is undergoing replication. Draw in the strands of newly synthesized DNA and identify (a) the polarity of the newly synthesized strands, (b) the leading and lagging strands, (c) Okazaki fragments, and (d) RNA primers.arrow_forward
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