Question

Transcription of a part of a DNA molecule with a nucleotide sequence of A-A-A-C-A-A-C-T-T results in a mRNA molecule with the complementary sequence of ______.

Options

• G-G-G-A-G-A-A-C-C

• U-U-U-G-U-U-G-A-A

• T-T-T-G-A-A-G-C-C

• C-C-C-A-C-C-T-C-C

Answer 1

Transcription of a part of a DNA molecule with a nucleotide sequence of A-A-A-C-A-A-C-T-T results in an mRNA molecule with the complementary sequence of U-U-U-G-U-U-G-A-A.

Explanation:

In the process of transcription, the DNA sequence is used as a template to create a complementary RNA strand according to specific base-pairing rules. In RNA, Adenine (A) pairs with Uracil (U) instead of Thymine, Cytosine (C) pairs with Guanine (G), and Thymine (T) in DNA pairs with Adenine (A) in RNA. Therefore, the DNA sequence A-A-A-C-A-A-C-T-T translates to U-U-U (for A-A-A), G-U-U (for C-A-A), and G-A-A (for C-T-T), resulting in the final mRNA sequence of U-U-U-G-U-U-G-A-A.