THE MOLECULAR BASIS OF INHERITANCE
THE SEARCH FOR INHERITABLE MATERIAL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Nitrogen bases are held together by peptide bonds
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A and T, C and G always occur in equal amounts
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Proteins are the carriers of genetic information
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C and G rarely occur in eukaryotic organisms
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Detailed explanation-1: -Chargaff’s rules state that in the DNA of any species and any organism, the amount of guanine should be equal to the amount of cytosine and the amount of adenine should be equal to the amount of thymine.
Detailed explanation-2: -Erwin Chargaff found that in DNA, the ratios of adenine (A) to thymine (T) and guanine (G) to cytosine (C) are equal. This parity is obvious in the final DNA structure.
Detailed explanation-3: -Summary. Chargaff’s rule 1 is that the number of guanine units approximately equals the number of cytosine units and the number of adenine units approximately equals the number of thymine units. Chargaff’s rule 2 is that the composition of DNA varied from one species to another.
Detailed explanation-4: -Chargaff’s rules state that DNA from any cell of all organisms should have a 1:1 ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine.