A new type of nucleic acid molecule is found have a base composition of 30% adenine, 20% thymine, 17% cytosine and 33% guanine. The molecule is probably:
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Single stranded DNA molecule.
According to Chargaff’s rule :
Concentration of adenine [A] =concentration of thymine [T]
Therefore if [A]=30% then the [T] should be equal to 30%. If it is So, then the molecule is double stranded DNA molecule. So this rule is not applicable, so answer is not double stranded DNA molecule.
The possibility of Adenine=30% and Thymine=20% is only in single stranded DNA molecule.
And in this question, there is no uracil given so answer is not RNA. As we know in RNA uracil is present instead of thymine...
The DNA is made up of four kinds of nitrogenous bases which include:
Guanine (G) Cytosine (C) Adenine (A) Thymine (T)
Two of the bases are purines -- adenine and guanine. The pyrimidines are thymine and cytosine.
Adenine pair with thymine by two hydrogen bonds. Guanine pair with cytosine by three hydrogen bonds.
The RNA is made up of four kinds of nitrogenous bases which include:
Guanine (G) Cytosine (C) Adenine (A) Uracil (U)
- 31 Jul 2018 @ 09:00