7. Table 1 contains data that Erwin Chargaff published about the composition of DNA. Table 1. Proportions of nitrogenous bases in the DNA of different organisms. Data from Chargaff and Davidson (1955). Organism Tissue % Adenine % Guanine % Cytosine % Thymine Yeast 31.3 18.7 17.1 32.9 Sea Urchin Sperm Bone marrow | 28.6 Thymus Sperm 32.8 17.7 18.4 32.1 Rat 21.4 21.5 28.4 Human 30.9 19.9 19.8 29.4 Human 30.3 19.5 19.9 30.3 a. Based on the data in Table 1, mark the following statements as true (T) or false (F). Justify each answer in one or two sentences. 1.In each organism, there is approximately one adenine for every thymine. 2.In each organism, the proportions of adenine plus thymine equal those of cytosine plus guanine. -3. In each organism, there is approximately one guanine for every thymine. 4.In each organism, there is approximately one guanine for every cytosine.
7. Table 1 contains data that Erwin Chargaff published about the composition of DNA. Table 1. Proportions of nitrogenous bases in the DNA of different organisms. Data from Chargaff and Davidson (1955). Organism Tissue % Adenine % Guanine % Cytosine % Thymine Yeast 31.3 18.7 17.1 32.9 Sea Urchin Sperm Bone marrow | 28.6 Thymus Sperm 32.8 17.7 18.4 32.1 Rat 21.4 21.5 28.4 Human 30.9 19.9 19.8 29.4 Human 30.3 19.5 19.9 30.3 a. Based on the data in Table 1, mark the following statements as true (T) or false (F). Justify each answer in one or two sentences. 1.In each organism, there is approximately one adenine for every thymine. 2.In each organism, the proportions of adenine plus thymine equal those of cytosine plus guanine. -3. In each organism, there is approximately one guanine for every thymine. 4.In each organism, there is approximately one guanine for every cytosine.
Biochemistry
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ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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