Question

20 what is the correct dna sequence that pairs up to the following dna strand? tat-tag-att-aca
a ata-atc-taa-tga
b aua-auc-uaa-ugu
c tat-tag-att-aca
d utu-utc-tuu-tgt

Explanation:

DNA base - pairing rules: Adenine (A) pairs with Thymine (T), and Cytosine (C) pairs with Guanine (G).
For the given DNA strand TAT - TAG - ATT - ACA:

• For the first triplet TAT: A pairs with T, so the complementary triplet is ATA.
• For the second triplet TAG: A pairs with T, C pairs with G, so the complementary triplet is ATC.
• For the third triplet ATT: A pairs with T, so the complementary triplet is TAA.
• For the fourth triplet ACA: T pairs with A, so the complementary triplet is TGA.

Answer:

A. ATA - ATC - TAA - TGA