6 In a DNA percentage of thymine is 20% then what is the percentage of guanine
6 In a DNA percentage of thymine is 20% then what is the percentage of guanine
- 20%
- 40%
- 30%
- 60%
The Correct Option is C
Solution and Explanation
The correct option is (C) : 30%
The DNA molecule should have an equal amount of pyrimidine (cytosine and thymine) and purine (adenine and guanine), according to Chargaff's rule. The number of adenine molecules is equivalent to the number of thymine molecules, and the number of guanine molecules is equivalent to the number of cytosine molecules. A = T, T = G, and C = C According to the legislation, dsDNA must also have 20% guanine if it has 20% cytosine. Therefore, the G + C component proportion is 40%. Both A and T molecules are present in the remaining 60%. The proportion of adenine molecules is 30% since adenine and guanine are both present in equal amounts at all times. The right response is thus "30%."
Top Questions on The DNA
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D. The alien piece of DNA is not an integral part of chromasame.
E. It shows ability to replicate.
Choose the correct answer from the options given below: - Who discovered DNA?
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Concepts Used:
Structure of DNA and RNA
DNA Structure:
Human DNA is unique and is made up of 3 billion base pairs. However, 99% of them are the same in all humans. The sequence of these bases determines what information needs to be coded that is necessary for the organism's growth and development. During the process of transcription (when DNA is replicated), a product is formed known as RNA (Ribonucleic Acid). This RNA is responsible for translating genetic information from DNA to protein followed by reading through ribosomes.
Read More: Structure of DNA
RNA Structure:
The ribonucleic acid has all the components same to that of the DNA with only 2 main differences within it. RNA has the same nitrogen bases called the adenine, Guanine, Cytosine as that of the DNA except for the Thymine which is replaced by the uracil. Adenine and uracil are considered as the major building blocks of RNA and both of them form base-pair with the help of 2 hydrogen bonds.
RNA resembles a hairpin structure and like the nucleotides in DNA, nucleotides are formed in this ribonucleic material(RNA). Nucleosides are nothing but the phosphate groups which sometimes also helps in the production of nucleotides in the DNA.
Read More: Structure of RNA