Sickle cell anemia is caused by a single letter mutation so transcription will lead to synthesis of a different <u><em>mRNA</em></u> molecule . The different mRNA molecule will lead to a different <em><u>protein</u></em> where a single amio acid is different(there is valine instead of glutamic acid)
Answer - A
Prokaryotic cells, being unicellular organisms, do not have a defined nucleus. They have a nucleoid in place of the nucleus which is formed of a single chromosome consisting of double stranded DNA.
