Final answer:
The complementary DNA sequence to GCTTATAT is CGAATATA because of the specific base-pairing rules where A pairs with T, and C pairs with G. The correct answer for the question is option(C).
Step-by-step explanation:
To determine which sequence on a DNA molecule would be complementary to GCTTATAT, it is essential to understand the base-pairing rules where adenine (A) always pairs with thymine (T), and cytosine (C) always pairs with guanine (G).
In this context, the complementary sequence to GCTTATAT would be:
- G pairs with C
- C pairs with G
- T pairs with A
- T pairs with A
- A pairs with T
- T pairs with A
- A pairs with T
- T pairs with A
Therefore, the complementary sequence would be CGAATATA, making option c) the correct answer.