which of the following DNA sequences would likely be the most stable? (only one strand of the helix is shown)

A) CCGAGGCCT
B) CGTATAGGG
C) CCCGGGGCC
D) CTAAGCTTT
E) ATATATATA

I know the answer is c but why is that true?

Cgtataggg

To determine which DNA sequence is likely the most stable, we need to consider the pairing of nucleotides. In DNA, the sequence of nucleotides on one strand is complementary to the sequence on the other strand. This means that adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).

By examining each option, we can determine the stability based on the number and type of complementary base pairs:

A) CCGAGGCCT
This sequence has four C-G pairs and two A-T pairs.

B) CGTATAGGG
This sequence has three C-G pairs and three A-T pairs.

C) CCCGGGGCC
This sequence has eight C-G pairs and zero A-T pairs.

D) CTAAGCTTT
This sequence has three C-G pairs and six A-T pairs.

E) ATATATATA
This sequence has zero C-G pairs and eight A-T pairs.

Based on the number of C-G base pairs, option C (CCCGGGGCC) has the highest stability with eight C-G pairs. These pairs have three hydrogen bonds compared to the two hydrogen bonds formed by A-T pairs. Therefore, option C is the most stable DNA sequence among the given choices.