If ds DNA has 20% cytosine, then percentage of adenine is ?

Question

Answer

Muskan and monali both are  rightaccording to chargoff's rule A+G=T+C and A=T, G=Ctherefore G=C=20 and G+C=40100-40=60A=T=30

Answer

Acc. to chargauf's rule

Answer

30% is right answer

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According to chaargaff rule if adenine is 20% then thymine should be 20% cytosine 30% guanin 30%. Because sum up all bases should have outcomes of 100.

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30%

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30%

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30%

Answer

80%

Answer

Percentage of Adenine in ds DNA with 20% Cytosine:

To determine the percentage of adenine in a double-stranded (ds) DNA molecule with 20% cytosine, we need to understand the base pairing rules in DNA and calculate the complementary base pair percentages.

Base Pairing Rules:
- Adenine (A) pairs with Thymine (T)
- Cytosine (C) pairs with Guanine (G)

Calculations:
1. Since DNA is a double-stranded molecule, the percentages of each base on one strand will be the same as the percentages of their complementary bases on the other strand. Therefore, we will only focus on the percentage of cytosine (C) in this case.
2. If cytosine (C) makes up 20% of the DNA molecule, then guanine (G) will also make up 20% since they are paired.
3. The total percentage of cytosine (C) and guanine (G) together is 40% (20% + 20% = 40%).
4. The remaining percentage must be divided between adenine (A) and thymine (T) since they are also complementary base pairs.
5. As DNA is a double-stranded molecule, the total of adenine (A) and thymine (T) should be 100% - 40% = 60%.
6. Since adenine (A) pairs with thymine (T), they will have equal percentages. So, both adenine (A) and thymine (T) will have 30% (60% / 2 = 30%) each.
7. Therefore, the percentage of adenine (A) in the ds DNA molecule with 20% cytosine (C) is 30%.

Summary:
In a ds DNA molecule with 20% cytosine (C), the percentage of adenine (A) will be 30%. This is because adenine (A) pairs with thymine (T) and the total percentage of adenine (A) and thymine (T) together is equal to the total percentage of cytosine (C) and guanine (G), which is 40%. So, the remaining percentage of 60% is divided equally between adenine (A) and thymine (T), resulting in 30% each.

Answer

The answer should be 30%.Because if there 20% cytosine present then amount of guanine is 20%.rest amount is for adenine and thymine which is 60%.Then individual amount of adenine is 30%.all the best.

Answer

30%

Similar NEET Doubts

If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?

If the percentage of adenine and guanine is 30% then the percentage of thymine and cytosine is?

If a double stranded DNA has 20% of cytosines, calculate the percent of adenine in the DNA.

In a DNA molecule , Adenine is 30% then what would be the % of guanine?

In a DNA molecule cytosine is 18% Percentage ofadenine would be

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