Question

Our genetic material, DNA, is formed from a 4 letter "alphabet" of bases: A, T, G, C (adenine, thymine, guanine, and cytosine). The order in which the letters are arranged is important, but because a molecule can move, there is no difference between a sequence and the same sequence reversed. For example, the sequence (A, A, T, A, G, A, T) is the same as the sequence (T, A, G, A, T, A, A). (In reality, DNA molecules have identifiable ends, but ignore that in this problem.) How many distinct DNA sequences of 6 bases are there

Answer 1

2048

Step-by-step explanation:

Since DNA is formed from a 4 letter of bases: A, T, G, C (adenine, thymine, guanine, and cytosine) therefore we have 4^5

Since the base sequence is the same as the reverse,

The number of DNA of sequence of 6 bases=4^6= 4096

Since, the reverse is the same as the forward sequence then the answer is divided by 2 =4096/2 = 2048