Biology: Life on Earth (11th Edition)
11th Edition
ISBN: 9780134168296
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Textbook Question
Chapter 12, Problem 5MC
The “rungs” of the DNA double helix are held together by
a. ionic bonds.
b. hydrogen bonds.
c. covalent bonds.
d. the force of the backbones on the outside of the helix pushing them together.
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Students have asked these similar questions
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 (11th Edition)
Ch. 12 - 1. If a parental DNA strand has the base sequence...Ch. 12 - 2. What happens at the conclusion of DNA...Ch. 12 - An insertion mutation occurs when a nucleotide is...Ch. 12 - The rungs of the DNA double helix consist of any...Ch. 12 - The “rungs” of the DNA double helix are held...Ch. 12 - 1. DNA consists of subunits called_________. Each...Ch. 12 - The subunits of DNA are assembled by linking...Ch. 12 - The “base pairing rule” in DNA is that adenine...Ch. 12 - 4. When DNA is replicated, two new DNA double...Ch. 12 - The DNA double helix is unwound by an enzyme...
Ch. 12 - 6. Sometimes mistakes are made during DNA...Ch. 12 - Describe the experimental evidence that DNA is the...Ch. 12 - 2. Draw the general structure of a nucleotide....Ch. 12 - Describe the structure of DNA. Where are the...Ch. 12 - How is information encoded in the DNA molecule?Ch. 12 - 5. Describe the process of DNA replication.
Ch. 12 - How do mutations occur? Describe the principal...Ch. 12 - 1. In an alternate universe, although proteins are...Ch. 12 - Prob. 2AC
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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_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_forwardWhich 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_forward
- A DNA molecule 300 bp long has 20 complete rotations. This DNA molecule is a. positively supercoiled. b. negatively supercoiled. c. relaxed.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 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_forward
- Which of the following is true about the structure of DNA as proposed by Watson and Crick (B-form DNA)? A. DNA forms a left-handed double helix. B. The strands of DNA are parallel. C. The complementary base pairs are held together by hydrogen bonds. D. A complete turn of the double helix occurs after every base pair.arrow_forwardHelicase unwinds DNA by disrupting... A. Covalent bonds B. Hydrogen bonds C. A and B D. Neither A nor Barrow_forwardWhich of the following is the correct way that a polynucleotide chain is put together in one DNA strand? a. 5’ OH of the sugar from one nucleotide attacks the 3’ Phosphate of the next nucleotide to form the phosphate diester bond. b. 3’ phosphate of the sugar from one nucleotide attacks the 5’ OH of the next nucleotide to form the phosphate diester bond. c. 5’ phosphate of the sugar from one nucleotide attacks the 3’ OH of the next nucleotide to form the phosphate diester bond. d. 3’ OH of the sugar from one nucleotide attacks the 5’ Phosphate of the next nucleotide to form the phosphate diester bond.arrow_forward
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