Question

1. consider a different dna molecule. if 15% of the bases are cytosine (c), what percentage of the bases would be adenine (a)? circle your answer. 15% 30% 35% 70%

Explanation:

Step1: Recall DNA base pairing rules

In DNA, cytosine (C) pairs with guanine (G), so the percentage of C equals the percentage of G. Given C is 15%, so G is also 15%.

Step2: Calculate total percentage of C and G

Sum of C and G percentages: \(15\% + 15\% = 30\%\)

Step3: Calculate percentage of A and T

The total percentage of all bases is 100%, so the percentage of adenine (A) and thymine (T) is \(100\% - 30\% = 70\%\)

Step4: Find percentage of A

Since A pairs with T, their percentages are equal. So percentage of A is \(\frac{70\%}{2}= 35\%\)

Answer:

35%