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प्रश्न
If a double stranded DNA has 20 per cent of cytosine, calculate the per cent of adenine in the DNA.
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उत्तर
According to Chargaff’s rule, the DNA molecule should have an equal ratio of pyrimidine (cytosine and thymine) and purine (adenine and guanine). It means that the number of adenine molecules is equal to thymine molecules and the number of guanine molecules is equal to cytosine molecules.
% A = % T and % G = % C
If double stranded DNA has 20% of cytosine, then according to the law, it would have 20% of guanine.
Thus, percentage of G + C content = 40%
The remaining 60% represents both A + T molecules. Since adenine and guanine are always present in equal numbers, the percentage of adenine molecule is 30%.
संबंधित प्रश्न
Chargaff’s rules are applicable to ______.
If a double stranded DNA has 20% of cytosine, what will be the percentage of adenine in it?
In some viruses, RNA is present instead of DNA indicating that ______.
A nucleoside differs from a nucleotide. It lacks the ______.
The fact that a purine base always paired through hydrogen bonds with a pyrimidine base leads to, in the DNA double helix ______.
What is the nature of the strands of the DNA duplex?
How far is each base pair from the next one in DNA double helix model?
If 30 percent of an organism’s DNA is thymine, then ______.
H-bonds between Cytosine and Guanine are ______.
There is no DNA in ______.
DNA is made of two chains that twist about one another in the shape of a ______.
______ occurs in RNA instead of the nitrogenous base thymine found in DNA.
A peptide chain assumes secondary structure through the formation of ______.
Retroviruses do not follow central Dogma. Comment.
Polymerase chain reaction (PCR) amplifies DNA following the equation.
What structural difference exists between the pentose sugar found in DNA and the pentose sugar found in RNA?
The backbone of a polynucleotide chain is formed by which components?
In a DNA double helix, where are the nitrogenous bases located?
What is the significance of the 2′-OH group in ribose compared to deoxyribose?
Which of the following nitrogenous bases is classified as a purine with a double-ring structure?
What structural difference exists between the pentose sugar found in DNA and the pentose sugar found in RNA?
The phosphate group in a nucleotide is attached to which carbon of the pentose sugar?
Which end of a polynucleotide chain contains a free phosphate group?
The backbone of a polynucleotide chain is formed by which components?
In a DNA double helix, where are the nitrogenous bases located?
