13 GeV
Assuming your repetition of the word 'percent' was intentional,30%% means 30 X (1/100) X (1/100) = 0.0030, which is 3/1000.If the question had been, 'What is 30 percent equal to?', then the correct answer would be 0.3 or 3/10.
136.50
3/10
90 minus 30 percent - and therefore 30 percent OFF the number, is equal to 90 x (1 - (30 / 100)) = 90 x (1 - 0.3) = 90 x 0.7 = 63. 30 percent OF 90 is equal to 90 x (30 / 100) = 90 x 0.3 = 27
Since DNA is double-stranded, the percentages of adenine (A) and thymine (T) must add up to 100% together, as well as the percentages of guanine (G) and cytosine (C). If 30% is guanine (G), then cytosine (C) must also be 30% to keep the molecular structure consistent.
There are four bases in the DNA double helix: adenine, guanine, cytosine and thymine. An adenine in one strand always pairs with a thymine in the other strand. Similarly, a cytosine always pairs with a guanine. So the number of adenines always equals the number of thymines, and the number of cytosines always equals the number of thymines. The total number of bases must equal 100%. So if 30% of the bases are adenine, another 30% must be thymine because they always pair with each other. Thymine and adenine added together therefore make 60% of the bases. The remaining 40% must be cytosine plus guanine. If the number of cytosines must equal the number of guanines, the percentage of cytosines must be ....... well, you can work it out for yourself!
If there is 10% adenine, then there must also be 10% thymine. The remaining 80% of the DNA must be composed of guanine and cytosine, specifically, 40% of each. The answer to your question is therefore 40% cytosine is present in this DNA molecule.
If there is 20% thymine in a DNA molecule, then there must also be 20% adenine since they pair together. This leaves 60% of the DNA for cytosine and guanine. Therefore, the amount of cytosine is 30% in this DNA molecule.
If yoy have a DNA Double Helix then you know that given the percentage of one base you can find the percentage of the rest. This is because of the fact that the bases always pair with the same partner (A-T and G-C). So whatever percent of ony you have you know its partner will always have the same. You also know that each of the other two bases have an equal share in what is left. So to work through you examlpe. If you know there is 25% A then you also know there is 25% T (as this must be the same). What is left is 50% and because this must be split equally you can see that each of the other bases ( ie. C and G) must also be 25% so in short you have 25% Cytosine. For a different example: If you know you have 30% T then you can see you must also have 30% A. This leaves only 40% so each of C and G must make up 20%.
30 percent
If a DNA analysis of a gene shows 20 adenine bases, there would be no uracil present as uracil is not typically found in DNA. Uracil is only found in RNA. DNA contains adenine, thymine, cytosine, and guanine, while RNA contains adenine, uracil, cytosine, and guanine.
Double Stranded DNA is paired, with Adenine paired with Thymine Cytosine paired with Guanine Then the percent Cytosine in one strand will be exactly the percent Guanine in the other strand. And between the two strands, the percent Cytosine will be equal to the percent Guanine. For a random distribution, the percent should be about 25% for each nucleotide, or 50% for the GC pair, and 50% for the AT pair. However, DNA actually varies considerably from organism to organism. Streptomyces coelicolor A3(2), has a GC content as high as 72% Plasmodium falciparum has a GC content as low as 20%. See Wikipedia link on GC Content.
30% = 0.30
3000
Expressed as a decimal, 30 percent is equal to 0.3.
If there are 40 base pairs in the DNA molecule and 15 of them are cytosine, then the remaining 25 bases would be composed of adenine, thymine, and guanine. Since adenine pairs with thymine, there would be 25 adenine bases in the DNA molecule.