BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 14, Problem 7U
Which of the following is NOT pan of the Watson-Crick model of the structure of DNA?
a. DNA is composed of two strands.
b. The two DNA strands are oriented in parallel (5′-to-3′).
c. Purines bind to pyrimidines.
d. DNA forms a double helix.
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While trying to determine the structure of DNA, Watson and Crick at one point proposed that like bases are bonded to like bases. For example, thymine would be bonded to thymine, cytosine would be bonded to cytosine, and so on. Explain why this proposed model would not fit based on what was discovered to be true about DNA.
You have a sample of genetic material. The nitrogenous base content is 29% guanine.
a) If the sample is DNA, what are the amounts of the other bases? Explain your thought process
b) Why can you not determine the amounts of the other bases if the sample is RNA? Explain your answer
c) How did Watson and Crick make use the relationships between base pairs as they constructed the model for DNA?
Which of the following statements DOES NOT apply to the Watson and Crick model of DNA?
a. The two strands of the DNA helix are anti-parallel.
b. The distance between the strands of the helix is 20 angstroms (A).
c. The framework of the helix consists of sugar-phosphate units of the nucleotides.
d. The two strands of the helix are held together by covalent bonds.
e. The purines are attracted to the pyrimidines.
...Explain your answer.
Chapter 14 Solutions
BIOLOGY
Ch. 14.1 - Describe the experiments of Griffith and Avery.Ch. 14.1 - Evaluate the evidence for DNA as genetic material.Ch. 14.2 - Explain how the WatsonCrick structure rationalized...Ch. 14.2 - Prob. 2LOCh. 14.3 - Prob. 1LOCh. 14.3 - Prob. 2LOCh. 14.4 - Prob. 1LOCh. 14.4 - Prob. 2LOCh. 14.4 - Diagram the functions found at the replication...Ch. 14.5 - Compare eukaryotic replication with prokaryotic.
Ch. 14.5 - Prob. 2LOCh. 14.5 - Prob. 3LOCh. 14.6 - Prob. 1LOCh. 14.6 - Prob. 2LOCh. 14 - Prob. 1DACh. 14 - Prob. 2DACh. 14 - Prob. 1IQCh. 14 - Prob. 2IQCh. 14 - How does the structure of eukaryotic genomes...Ch. 14 - Prob. 4IQCh. 14 - Prob. 1UCh. 14 - Which of the following is NOT a component of DNA?...Ch. 14 - Chargaff studied the composition of DNA from...Ch. 14 - The bonds that hold two complementary strands of...Ch. 14 - Prob. 5UCh. 14 - Prob. 6UCh. 14 - Which of the following is NOT pan of the...Ch. 14 - If one strand of a DNA is 5 ATCGTTAAGCGAGTCA 3,...Ch. 14 - Hershey and Chase used radioactive phosphorus and...Ch. 14 - The Meselson and Stahl experiment used a density...Ch. 14 - Prob. 4ACh. 14 - If the activity of DNA ligase was removed from...Ch. 14 - Successful DNA synthesis requires all of the...Ch. 14 - The synthesis of telomeres a. uses DNA polymerase,...Ch. 14 - When mutations that affected DNA replication were...Ch. 14 - Prob. 1SCh. 14 - In the Meselson-Stahl experiment, a control...Ch. 14 - Enzyme function is critically important for the...
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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
- Compare a picture of a structure of Human DNA and Bacterial DNA, are they similar?arrow_forwardWhat defines one end of a DNA molecule as the 5’ end? a. What defines the other end at the 3’ end? b. When two strands of DNA are paired together to form a functional molecule, what is interesting to note about their 5’ and 3’ ends?arrow_forwardWhat was the contribution of Rosalind Franklin to the discovery of DNA's structure? A. X-ray diffraction images of DNA that showed that DNA had two chains twisted into a double helix with a backbone containing phosphate groups on the outside and bases on the inside B. Theoretical model of DNA's structure and the pairing of nitrogenous bases C. Discovery that in DNA the amounts of adenine and thymine were identical as were the amounts of guanine and cytosinearrow_forward
- State the properties of the WatsonCrick model of DNA in the following categories: a. number of polynucleotide chains b. polarity (running in same direction or opposite directions) c. bases on interior or exterior of molecule d. sugar/phosphate on interior or exterior of molecule e. which bases pair with which f. right- or left-handed helixarrow_forwardDNA contains many hydrogen bonds. Are hydrogen bonds stronger or weaker than covalent bonds? What are the consequences of this difference in strength?arrow_forwardChargaff's analysis of the relative base composition of DNA showed us that a. The amount of adenine is equivalent to cytosine, and thymine is equivalent to guanine b. The amount of purines is equivalent to the amount of pyrimidines c. All four nitrogenous bases occur in equal amounts in DNA d. The base composition of a species' DNA is random e. None of the above are truearrow_forward
- What was the contribution of Rosalind Franklin to the discovery of DNA's structure? a.Discovery that in DNA the amounts of adenine and thymine were identical as were the amounts of guanine and cytosine b.Theoretical model of DNA's structure and the pairing of nitrogenous bases c. X-ray diffraction images of DNA that showed that DNA had two chains twisted into a double helix with a backbone containing phosphate groups on the outside and bases on the insidearrow_forwardWhich is a difference between B-DNA and A-DNA? A. For polynucleotide strands containing the same number of nucleotides, the B-DNA strand will be shorter from end-to-end than the corresponding A-DNA. B. Both are helical, but B-DNA is right-handed and A-DNA is left-handed. C. The sugar in A-DNA is more oxidized than that in B-DNA D. Helical structures in RNA predominantly adopt the B-DNA conformation. E. None of the above. The tetranucleotide AGTC (in DNA) has a free hydroxyl group on ____. A. A B. G, T, and C C. C D. A, G, T, and Carrow_forwardEnzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes? Group of answer choices A. All bases would be separated from the deoxyribose sugars B. The purines would be separated from the deoxyribose sugars C. The phosphodiester linkages between deoxyribose sugars would be broken D. The two strands of the double helix would separate E. The pyrimidines would be separated from the deoxyribose sugarsarrow_forward
- Watson and Crick used scientific reasoning, their knowledge of biochemistry, and the research of other scientists to make one of the most important scientific claims of their time: DNA is a double helix with strands running in opposite directions. Between these strands, A pairs with T, and C pairs with G.arrow_forwardImagine that all six of the key players in the discovery of the structure of DNA had agreed to work together from the start. How do you think the processarrow_forwardIn 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_forward
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