Q. What is the numeric relation between purine and pyrimidine bases in the DNA molecule? Is that relation valid in the RNA molecules?

The DNA molecule is made of two bound polynucleotide chains that to form a helical structure (the double helix). The binding of the two chains is between their nitrogen-containing bases and it always obeys the following rules: a pyrimidine base, and guanine (G), adenine (A), a purine base, binds with thymine (T), a purine base, and binds to cytosine (C), a pyrimidine base. Therefore in one molecule of the DNA there will be the same number of adenine (A) and thymine (T) and same number of cytosine (C) and guanine (G). The quantities of purine and of pyrimidine bases then will also be the same in a 50% proportion for each type. The relation A = T and C = G, or A/T = C/G = 1, is called Chargaff's relation and the pairing rules described above are known as Chargaff's rules.

In the RNA there are not two nucleotide chains. The RNA is a simple chain molecule proportionality of nitrogen-containing bases to form it.

Posted Date: 5/30/2013 1:48:12 AM | Location : United States

Ask an Expert

Related Discussions:- What is the numeric relation between purine bases, Assignment Help, Ask Question on What is the numeric relation between purine bases, Get Answer, Expert's Help, What is the numeric relation between purine bases Discussions

Write discussion on What is the numeric relation between purine bases
Your posts are moderated

Write your message here..

Related Questions

Explain components of second heart sounds, Explain Components of second hea... Explain Components of second heart sounds? The first component of S 2 is due to closure of aortic valve (A,). The second component is due to closure of pulmonary valve (P 2 ).

Mycroboilogy mycoplasma, How we write assimgment about mycobiology of mycop... How we write assimgment about mycobiology of mycoplasma in detail

Concept mapping, Mrs. Jackson is a 76 year old woman living in a skilled nu... Mrs. Jackson is a 76 year old woman living in a skilled nursing facility. She has Hx: CVA with left-sided weakness, incontinent of bowel and bladder, PEG tube, GERD, HTN, Dementia,

Characteristics of ammonium transport system, Characteristics of Ammonium T... Characteristics of Ammonium Transport System The following are the characteristics of ammonium transport system: Ammonium transport system is ammonia' repressible

Animal around us, #question.what are the reason that arthropodans are abund... #question.what are the reason that arthropodans are abundant in nature.

Determine immunodeficiency presented by aids patients, What is the cause of... What is the cause of the immunodeficiency presented by AIDS patients? The cause of the immunodeficiency shown by AIDS patients is the destruction of CD4 T helper lymphocytes by

Branchiostoma sp, feeding habit of branchiostoma? feeding habit of branchiostoma?

Why pluricellular organisms are produced by serial mitosis, From the zygote... From the zygote, pluricellular organisms are produced by serial mitosis. Would this formation be possible if every cell made by mitosis had an identical life in relation to its ant

Define importance of nutrition in human body, Define Importance of Nutritio... Define Importance of Nutrition in Human Body? Nutrition is increasingly being recognized as an important determinant, which modulates the biological process of ageing. Poor nut

What are flight adaptations present by birds, Q. What are flight adaptation... Q. What are flight adaptations present by birds? Wings associated to a well-developed pectoral musculature, less accumulation, pneumatic bones of feces in the bowels due to the