Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 8, Problem 13QP
Summary Introduction
Introduction: It was understood during the 1940s that DNA carries genetic information and it is the transforming factor in bacterial cells. Watson and Crick also began their work on this prospect in the early 1950s.
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Avery, MacLeod, and McCarty demonstrated that the transforming principle can be destroyed by DNase. Thus, DNA is the genetic material
A. Both statements are correct
B. Both statements are incorrect
C. First statement is Correct, Second is Incorrect
D. First statement is Incorrect, Second is Correct
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.
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.
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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- 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.arrow_forwardRosalind Franklin's research contribution was essential in a. determining the nucleotide sequence of genes. b. discovering the existence of DNA. c. establishing the principles of heredity. d. establishing the structural features of DNA. e. determining the tertiary structure of proteins.arrow_forwardWatson and Crick used an approach called model building to deduce the structure of the DNA double helix.How does this differ from the more conventional experimental approach that is undertaken in a research laboratory? In this regard, why was the experiment of Meselsonand Stahl considered to be of such critical importance?arrow_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_forwardChemical analysis shows that a nucleic acid sample contains A, U, C, and G. Is this DNA or RNA? Why?arrow_forwardState 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_forward
- DNA 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_forwardDiscuss the contributions of Chargaff, Franklin/Wilkins, and Watson/Crick in the elucidation of the structure of DNA. What was the “take home” from each?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_forwardCompare a picture of a structure of Human DNA and Bacterial DNA, are they similar?arrow_forwardHow did Griffiths and Avery discover that DNA was the molecule of heredity? Would we have been able to discover the structure of DNA without this work? Why or why not? Would we have been able to understand or actually try to understand DNA replication without his work? Why or why not?arrow_forward
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