Beginning within the nucleus, the first step leading to the synthesis of a polypeptide is _____.
A: translation of an RNA nucleotide sequence into a sequence of amino acids
B: linking of nucleotides to form a polypeptide
C: removal of introns from RNA and the stitching together of exons
D: translation of a DNA nucleotide sequence into a sequence of amino acids
E: transferring of information from DNA to messenger RNA
The correct answer is option E.
Beginning within the nucleus, the first step leading to the synthesis of a polypeptide is transferring information from DNA to messenger RNA.
Polypeptide synthesis is the production of peptides. Peptides are organic compounds in which amino acids are joined through peptide bonds. Polypeptides contain amino acids which are the building blocks of proteins.
During polypeptide synthesis, the first stem is the conversation a part of DNA into mRNA. DNA has functional units called genes. A gene is a segment of DNA that carries codes for mRNA, rRNA, or tRNA. Thus, a majority of genes provide codes for the synthesis of polypeptides or proteins by transcribing codes into mRNA.
Polypeptides refer to many amino acids that are connected by peptide bonds. Smaller polypeptides, which are coded by two or more genes, produce a functional protein. In other cases, in the synthesis of large polypeptides, mRNA carries a transcript of many genes. In polypeptide synthesis, the first step is the synthesis of mRNA that encodes the polypeptide.