AP BIOLOGY

Detailed explanation-1: -The role of mRNA is to carry protein information from the DNA in a cell’s nucleus to the cell’s cytoplasm (watery interior), where the protein-making machinery reads the mRNA sequence and translates each three-base codon into its corresponding amino acid in a growing protein chain.

Detailed explanation-2: -The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm. Translation, the second step in getting from a gene to a protein, takes place in the cytoplasm.

Detailed explanation-3: -mRNA formed in the nucleus is transported out of the nucleus and into the cytoplasm where it attaches to the ribosomes. Proteins are assembled on the ribosomes using the mRNA nucleotide sequence as a guide. Thus mRNA carries a “message” from the nucleus to the cytoplasm.

Detailed explanation-4: -The mechanism of RNA translation into protein is carried out in three steps: initiation, elongation, and termination. During initiation, a tRNA and ribosome join an mRNA.

Detailed explanation-5: -The RNA which carries the genetic message from the nucleus to the ribosome is mRNA. mRNA stands for messenger RNA which carries a coding sequence for protein synthesis. These are known as transcripts. Messenger RNA transfers genetic information from DNA to the cytoplasm and is single-stranded.