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 2QP
Why do you think
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Why do you think all organisms use nucleic acids for encoding genetic information? Why not use proteins or carbohydrates? What advantages might DNA have as the source of genetic information?
Why do you think the first part of DNA (deoxyribonucleic acid) is different from RNA (Ribonucleic acid)?
Watson and Crick, the pair of researchers who determined the structure of DNA, deduced the pairing of nucleotides in DNA using information learned from Erwin Chargaff. Which of the following is the correct pairing of nucleotides in DNA?
a
guanine with adenine; cytosine with adenine
b
adenine with thymine; guanine with cytosine
c
cytosine with guanine; uracil with adenine
d
cytosine with adenine; thymine with guanine
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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- If you know that the number of nitrogenous bases in DNA = 4 and the number of amino acids = 20, then the number of possible genetic codes for these acids? choose the correct answer . A)20 B)24 C)60 D)64arrow_forwardProvide an explanation for why in DNA, the base G is always base paired with C and A is always base paired with T?arrow_forwardWhat structural feature allows DNA to store information?arrow_forward
- Why is DNA present in a double stranded form and not single stranded in organisms?arrow_forwardAccording to Chargaff's rule, if the DNA of a species contains 20% adenine, what percent of guanine will it contain? O 20% O 30% O 606 O none of the abovearrow_forwardWhy did DNA, rather than RNA, evolve to be the carrier of genetic information in cells?arrow_forward
- If one side of DNA molecule had a base sequence of adenine-adenine-guanine-cytosine-thymine-cytosine-thymine, what would the sequence of bases on the opposite side of the molecule be?arrow_forwardHow can two DNA fragments pair with each other?arrow_forwardWhile 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.arrow_forward
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