a) is used to find the gene that codes for a protein by matching amino acid sequences to codons, mRNA to cDNA, and cDNA to natural DNA. (1 point) g

mRNA

Explanation:

Messenger RNA (mRNA) is a single-strand RNA derived from the process of transcription, in which one strand of DNA serves as template to synthesize this molecule. The mRNA has an identical sequence to the gene, with the exception of thymine nucleotides that are replaced by uracils. During this process, the RNA polymerase synthesizes a precursor mRNA molecule (pre-mRNA), which contains both intronic and exonic regions. Subsequently, the introns are eliminated by RNA processing enzymes in a process known as RNA splicing, thereby resulting in a mature mRNA. Finally, this mature mRNA is decoded by the ribosome during the synthesis of proteins in a process named translation. The translation involves another type of RNA molecule: the transfer RNAs (tRNAs), which recognize codons in the mRNA and act as adaptors by the incorporation of specific amino acids in the protein sequence.