Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Textbook Question
Chapter 8, Problem 23QP
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
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.
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Chapter 8 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 8.4 - Two genes associated with breast cancer, BRCA1 and...Ch. 8.4 - Prob. 2GRCh. 8 - What are Bruces options at this point? Bruce and...Ch. 8 - Should he reconsider and try chemotherapy instead?...Ch. 8 - Should he go ahead and enroll on the chance that...Ch. 8 - Until 1944, which cellular component was thought...Ch. 8 - Why do you think nucleic acids were originally not...Ch. 8 - Prob. 3QPCh. 8 - In the experiments of Aery, MacLeod, and McCarty,...Ch. 8 - Read the following experiment and interpret the...
Ch. 8 - Recently, scientists discovered that a rare...Ch. 8 - List the pyrimidine bases, the purine bases, and...Ch. 8 - In analyzing the base composition of a DNA sample,...Ch. 8 - The basic building blocks of nucleic acids are: a....Ch. 8 - Adenine is a: a. nucleoside b. purine c....Ch. 8 - Polynucleotide chains have a 5 and a 3 end. Which...Ch. 8 - DNA contains many hydrogen bonds. Are hydrogen...Ch. 8 - Prob. 13QPCh. 8 - State the properties of the WatsonCrick model of...Ch. 8 - Using Figures 8.7 and 8.9 as a guide, draw a...Ch. 8 - A beginning genetics student is attempting to...Ch. 8 - Chemical analysis shows that a nucleic acid sample...Ch. 8 - Prob. 18QPCh. 8 - RNA is ribonucleic acid, and DNA is...Ch. 8 - What is the function of DNA polymerase? a. It...Ch. 8 - Which of the following statements is not true...Ch. 8 - Make the complementary strand for the following...Ch. 8 - How does DNA replication occur in a precise manner...Ch. 8 - Nucleosomes are complexes of: a. RNA and DNA b....Ch. 8 - Discuss the levels of chromosomal organization...
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- Why is DNA replication called semiconservative?arrow_forwardWhich 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.arrow_forwardWhich 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 nucleotidearrow_forward
- 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 IVarrow_forwardin the process of DNA replication, what happens to its products when DNA polymerase 1 is not present?arrow_forward1.1 What components must be available for DNA polymerase III to proceed with DNA synthesis during replication? 1.2 What will the consequences for the cell be if the following enzymes are not functioning? DNA polymerase III Primase DNA ligasearrow_forward
- 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.arrow_forwardWhy is DNA replication considered semiconservative? A. Both strands of each replicating DNA molecules are conserved. B. One molecule consists of the old strands and the other DNA molecule is entirely new. C. One strand of each replicating DNA molecule is conserved and the other strand is newly synthesized. D. Both strands of each replicating DNA molecule are new.arrow_forwardAssume that a certain bacterial chromosome has one origin of replication. Under some conditions of rapid cell division, replication could start from the origin before the preceding replication cycle is complete. How many replication forks would be present under these conditions?arrow_forward
- During DNA replication, why doesn’t DNA polymerase move away from the replication fork on both strands?arrow_forwardDuring DNA replication, the template sequence 5' ATAGGCC 3' would produce which one of the following sequences for the complementary strand? a. 5' GGCCTAT 3' b. 5' CCGGATA 3' c. 5' ATAGGCC 3' d. 5' TATCCGG 3'arrow_forwardDoes E. coli chromosomal replication always start at one particular site? What is called? If you were given the DNA sequence of E. coli chromosome, would you be able to identify where E. coli chromosomal replication starts? What is the end of E. coli chromosome replication?arrow_forward
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