Final answer:
The complementary DNA sequence to 5'-ATGCATGTCA-3' is 5'-TGACATGCAT-3' which is found by reading the original sequence in reverse and swapping each nucleotide with its complement: A with T and C with G.
Step-by-step explanation:
The complementary DNA sequence to the given 5'-ATGCATGTCA-3' is option c, which is 5'-TGACATGCAT-3'. This is because in DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G), and the two strands run in opposite directions (antiparallel). Therefore, to find the complementary sequence, you would read the original sequence in reverse order and replace each nucleotide with its partner: T with A, A with T, G with C, and C with G.
The complementary DNA sequence to 5' ATGCATGTCA 3' is 3' TACGTACAGT 5'. In DNA, bases always pair up: Adenine (A) with Thymine (T), and Cytosine (C) with Guanine (G). Therefore, to find the complementary sequence, we swap each base with its pairing base.