Enzymes that break down DNA catalyze the hydrolysis of thecovalent bonds that join nucleotides together. What wouldhappen to DNA molecules treated with these enzymes?(A) The two strands of the double helix would separate.(B) The phosphodiester linkages of the polynucleotidebackbone would be broken.(C) The pyrimidines would be separated from the deoxyribosesugars.(D) All bases would be separated from the deoxyribose sugars.

Enzymes that break down DNA catalyze the hydrolysis of thecovalent bonds that join nucleotides together. What wouldhappen to DNA molecules treated with these enzymes?(A) The two strands of the double helix would separate.(B) The phosphodiester linkages of the polynucleotidebackbone would be broken.(C) The pyrimidines would be separated from the deoxyribosesugars.(D) All bases would be separated from the deoxyribose sugars.

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 12QP: DNA contains many hydrogen bonds. Are hydrogen bonds stronger or weaker than covalent bonds? What...

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(1) Which end (5' or 3') of the molecule is here? (2) Which enzyme is probably functioning here to deal with supercoils in the DNA? (3) Which enzyme is probably functioning here to unwind the DNA? (4) Which nucleic acid is probably depicted here? (5) What are these short DNA fragments usually called? (6) Which enzyme probably functions here to couple these two newly synthesized fragments of DNA? (7) Is this strand the leading or lagging strand? (8) Which end (5' or 3') of the molecule is here?
If a strand of DNA has the sequence CGGTATATC, then the complementary strand of DNA has the sequence (a) ATTCGCGCA. (b) GCCCGCGCT. (c) GCCATATAG. (d) TAACGCGCT.
When DNA is heated sufficiently, the strands separate. The energy that it takes to separate the DNA is related to the amount of guanine and cytosine bases. Why is this so? (A) Adenine and thymine make 3 hydrogen bonds between each other, and guanine and cytosine don't make any hydrogen bonds. (B) Guanine and cytosine make 3 hydrogen bonds between each other, and adenine and thymine don't make any hydrogen bonds. (C) It takes more energy to break an A-T bond than it does a G-C bond. (D) It takes more energy to break a G-C bond than it does an A-T bond.
The 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.
(5) What are these short DNA fragments usually called? (6) Which enzyme probably functions here to couple these two newly synthesized fragments of DNA? (7) Is this strand the leading or lagging strand?
The following diagrams represent DNA molecules that are 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.
45. The double helix structure of deoxyribonucleic acid (DNA) is shown above. When DNA replicates, the two strands must "unzip." Which statement describes the energy requirements and forces involved? (A) Energy must be added to break the covalent bonds. (B) Energy must be added to break the hydrogen bonds. (C) Energy is released when the covalent bonds break. (D) Energy is released when the hydrogen bonds break.
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
The base composition of one of the DNA chains of a DNA double helix contains 18 mol-%A, 35 mol-%T, 26 mol-%C, and 21 mol-%G (a) What is the base composition of the complementary DNA chain? (b) Is the total amount of purine bases equal to the total amount of pyrimidine bases for the DNA double helix?
Write the sequence of the complementary DNA strand thatpairs with each of the following DNA base sequences:(a) GGTTAC(b) CCCGAA
(a) Eukaryotic DNA replication is more complex than prokaryotic replication. Give one reason why this should be so. (b) Why might eukaryotic cells need more kinds of DNA polymerases than bacteria?