Final answer:
The direct answer to transcribe the DNA sequence Hb A is the mRNA sequence UCA UUG CCG UCU GAA GAG UCC UCA GUC CAC GUG GUA. This process is carried out by RNA polymerase and follows specific base pairing rules.
Step-by-step explanation:
The transcription process refers to the synthesis of mRNA from a DNA template. Given the DNA sequence Hb A: AGT AAC GGC AGA CTT CTC AGG AGT CAG GTG CAC CAT, when transcribed to mRNA, the sequence would read UCA UUG CCG UCU GAA GAG UCC UCA GUC CAC GUG GUA. Transcription involves the enzyme RNA polymerase binding to the DNA template strand and synthesizing a complementary mRNA strand, respecting the complementary base pairing rules (A pairs with U, T pairs with A, C pairs with G, G pairs with C).
During this process, adenine (A) on the DNA pairs with uracil (U) on the mRNA, cytosine (C) with guanine (G), guanine (G) with cytosine (C), and thymine (T) with adenine (A) in the mRNA. This transcription is essential for gene expression as it's the first step towards protein synthesis.