Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 4, Problem 14PIAT
QUANTITATIVE In 1951, Erwin Chargaff was accumulating data on the molar ratios of
| Molar Ratios in DNA Preparations | |||||
|---|---|---|---|---|---|
| Source | A:G | T:C | A:T | G:C | purines:pyrimidines |
| Ox | 1.29 | 1.43 | 1.04 | 1.00 | 1.10 |
| Human | 1.56 | 1.75 | 1.00 | 1.00 | 1.0 |
| Chicken | 1.45 | 1.29 | 1.06 | 0.91 | 0.99 |
| Salmon | 1.43 | 1.43 | 1.02 | 1.02 | 1.02 |
| Wheat | 1.22 | 1.18 | 1.00 | 0.97 | 0.99 |
| Yeast | 1.67 | 1.92 | 1.03 | 1.20 | 1.0 |
Source: Chargaff, E. 1951. Federal Proceedings 10" 654–659.
Compare the molar ratios presented from each organism tested and between different organisms. Explain how these data could be used to show that Levene'stetranucleotide model is incorrect. What do they imply about the primary structure of DNA in different organisms?
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Chapter 4 Solutions
Biological Science (6th Edition)
Ch. 4 - What are the four nitrogenous bases found in RNA?...Ch. 4 - 2. What determines the primary structure of a DNA...Ch. 4 - 3. Which of the following describes the synthesis...Ch. 4 - Prob. 4TYKCh. 4 - Prob. 5TYUCh. 4 - Prob. 6TYUCh. 4 - What would be the sequence of the strand of DNA...Ch. 4 - 8. According to the RNA world model, a ribozyme...Ch. 4 - Make a concept map (see BioSkills 12 ) that...Ch. 4 - Prob. 10TYPSS
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