Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 12, Problem 5MC
Summary Introduction
Introduction:
DNA is a deoxyribonucleic acid which serves as a genetic material found in all prokaryotic and eukaryotic organisms. It has a thread-like double-stranded structure that provides stability to DNA. It is composed of phosphate-sugar backbone and
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Which of the following statement for the B-DNA helix is NOT true?
a.
It is a left-handed helix.
b.
Planes of bases are nearly perpendicular to the helix axis.
c.
Sugars are in the 2’-endo conformation.
d.
Bases are in the anti conformation.
e.
It is a common form of duplex DNA solution.
Much of the stability of the double-stranded DNA structure is the result of....
A. the angle of the planes of the bases with respect to the helix axis.B. the phosphodiester backbone.C. hydrogen bonding between purines.
D. the stacking interactions between base pair.
E. Both C and D
Indicate whether each of the following statements about
the double-helix secondary structure of DNA is true
or false.
a. The two polynucleotide strands are complementary
rather than identical.
b. Bases present extend outward from the
double helix.
c. Covalent bonding occurs between the two
polynucleotide strands.
d. The two polynucleotide strands run in the
5′-to-3′ direction
Chapter 12 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 12.1 - describe the experiments of Griffith; Avery,...Ch. 12.1 - explain why these experiments showed that DNA is...Ch. 12.2 - Some viruses, such as the tobacco mosaic virus...Ch. 12.2 - Which do you think would be more difficult to...Ch. 12.2 - Prob. 1CYLCh. 12.3 - Prob. 1CYLCh. 12.3 - Muscles, Mutations, and Myostatin The sequence of...Ch. 12.3 - How Much Genes Influence Athletic Prowess?Ch. 12.4 - describe the process of DNA replication, including...Ch. 12.4 - explain why DNA replication is called...
Ch. 12.4 - Muscles, Mutations, and Myostatin "Double-muscled"...Ch. 12.5 - Prob. 1TCCh. 12.5 - explain what mutations are and how they occur?Ch. 12.5 - explain why mutations are rare?Ch. 12.5 - describe the different types of mutations?Ch. 12.5 - Prob. 1CSRCh. 12 - If a parental DNA strand has the base sequence...Ch. 12 - Prob. 2MCCh. 12 - Prob. 3MCCh. 12 - The rungs of the DNA double helix consist of a....Ch. 12 - Prob. 5MCCh. 12 - Prob. 1FIBCh. 12 - Prob. 2FIBCh. 12 - Prob. 3FIBCh. 12 - Prob. 4FIBCh. 12 - Prob. 5FIBCh. 12 - Prob. 6FIBCh. 12 - Prob. 1RQCh. 12 - Prob. 2RQCh. 12 - Describe the structure of DNA. Where are the...Ch. 12 - Prob. 4RQCh. 12 - Describe the process of DNA replication.Ch. 12 - How do mutations occur? Describe the principal...Ch. 12 - In an alternate universe, although proteins are...Ch. 12 - Genetic information is encoded in the sequence of...
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- The antiparallel nature of DNA refers to a. its charged phosphate groups. b. the pairing of bases on one strand with bases on the other strand. c. the formation of hydrogen bonds between bases from opposite strands. d. the opposite direction of the two strands of nucleotides.arrow_forwardThe most important force for stability of the DNA double helix is: a. Disulfide bond b. Hydrophilic interactions c. electrostatic interaction d. Base stackingarrow_forwardIdentify the statements that describe the structure of DNA. (select all that are correct) A. A DNA double helix contains two sugar‑phosphate backbones oriented in opposite directions. B. Adenine is paired with thymine, and guanine is paired with cytosine. C. Adenine is paired with cytosine, and guanine is paired with thymine. D. The five‑carbon sugar of DNA is called ribose. E. The five‑carbon sugar of DNA is called deoxyribose.arrow_forward
- In Watson and Crick's model of DNA structure, the two strands of the DNA double helix are joined through a. Ionic bonds b. Hydrophobic interactions c. Covalent bonds d. Disulfide bonds e. Hydrogen bondsarrow_forwarda. unwinds the DNA helix b. stabilizes and stops the two strands from annealing (rebinding with each other) c. recoils the DNA d. cleaves both strands of DNA to relieve tension at supercoils e. places RNA primers at their proper location on the template strands f. acts as starting points for DNA polymerase g. adds DNA nucleotides to form new DNA strands h. forms phosphodiester bonds to join Okazaki fragments Esc 1. single-strand binding protein 2. helicase 3. DNA ligase 4. RNA primer 5. gyrase 6. DNA polymerase 53°F Cloudy 3 Q Search $ F5 FRarrow_forwardThe helix of an A-DNA differs from the helix of a B-DNA in all of the following EXCEPT which phrase? a. polarity of the strands b. thickness of the helix c. tilt of the bases d. appearance of the major and minor groovearrow_forward
- Which of the following does not contribute to the stability of the DNA? A. The presence of hydrogen between nitrogenous bases. B. Presence of the N-glycosidic bond between the nitrogenous base and phosphate group C. Presence of phosphodiester bond between the sugar and phosphate group on the sugar-phosphate backbone. D. Hydrophobic interaction between stacked nitrogenous bases.arrow_forwardWhich of the following is/are true about the two DNA strands that form a helix? (check all that apply) Select one or more: a.The 2 strands are antiparallel and complementary to each other b.The 2 strands are linked to each other by phosphodiester bonds c.The phosphate groups of nucleotides impart a negative charge to nucleic acidsarrow_forwardA DNA molecule 300 bp long has 20 complete rotations. This DNA molecule is a. positively supercoiled. b. negatively supercoiled. c. relaxed.arrow_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_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_forwardWhich 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..arrow_forward
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