Question

how will you replicate this strand of dna? 3 attggactg 5 5 tttgacga 3 5 taacctgac 3 3 taacctgac 5 3 tggatcgcc 5

Explanation:

Step1: Recall base - pairing rules

In DNA, A (adenine) pairs with T (thymine), and G (guanine) pairs with C (cytosine). Also, the new strand is antiparallel to the template strand. The template strand is \(3'\) - \(ATTGGACTG\) - \(5'\).

Step2: Determine complementary bases

For each base in the template strand:

• \(A\) (in template) pairs with \(T\), \(T\) (in template) pairs with \(A\), \(G\) (in template) pairs with \(C\), \(C\) (in template) pairs with \(G\).

The complementary bases for \(ATTGGACTG\) are \(TAACCTGAC\).

Step3: Reverse the direction

Since the template is \(3'\) - \(5'\), the new strand is \(5'\) - \(3'\). So the replicated strand is \(5'\) - \(TAACCTGAC\) - \(3'\)

Answer:

\(5'\) \(TAACCTGAC\) \(3'\) (corresponds to the option \(5'\) \(TAACCTGAC\) \(3'\))