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:

• A. G-G-G-A-G-A-A-C-C
• B. U-U-U-G-U-U-G-A-A
• C. T-T-T-G-A-A-G-C-C
• D. C-C-C-A-C-C-T-C-C

Answer 1

The correct option is B U-U-U-G-U-U-G-A-A

The molecule of DNA (Deoxyribonucleic acid) there are four bases adenine, guanine, cytosine, and thymine along with sugar and phosphate backbone. These four bases, when studied in RNA (Ribonucleic acid), is different from DNA i.e., adenine, guanine, cytosine, uracil. It was found that cytosine and guanine are bonded together with the help of three hydrogen bonds and adenine and thymine are bonded together by two hydrogen bonds in DNA. This bonding of adenine and thymine got changed to adenine and uracil in RNA.

So, the correct option is 'U-U-U-G-U-U-G-A-A'.