3. Most abundant RNA in the cell a, TRNA b. mRNA c. tRNA d. tRNA threonine ino acid
Answers
Answer:
Ribosomal ribonucleic acid (rRNA) is the most abundant type of RNA. It constitutes the material inside the ribosome and directly helps in the translation of mRNA into proteins. Based on the sedimentation coefficient, ribosomes are of two types- 70S ribosomes made of 50S and 30S submits, and 80s ribosomes. Prokaryotic cells are of the first type and eukaryotic cells are of the second type. Ribosomes of prokaryotic cells are around 20 nanometres or 200 angstroms in diameter and are composed of 65% rRNA and 35% proteins of ribosomes whereas eukaryotic ribosomes are between 25 and 30 nanometres.
Messenger RNA (mRNA) carries genetic information from the nucleus to the cytoplasm of a cell and is created when the DNA helix is copied in the first step for making proteins.