LIFE SCIENCE

Detailed explanation-1: -All cells require ribosomes, the main building block of non-coding RNA known as ribosomal ribonucleic acid (rRNA). To create the large and small ribosome subunits, ribosomal RNA is translated from ribosomal DNA (rDNA).

Detailed explanation-2: -Ribosomal ribonucleic acid (rRNA) is a type of non-coding RNA which is the primary component of ribosomes, essential to all cells. rRNA is a ribozyme which carries out protein synthesis in ribosomes.

Detailed explanation-3: -Actively growing mammalian cells, for example, contain 5 million to 10 million ribosomes that must be synthesized each time the cell divides. The nucleolus is a ribosome production factory, designed to fulfill the need for large-scale production of rRNAs and assembly of the ribosomal subunits.

Detailed explanation-4: -Ribosomal RNAs (rRNAs) are by far the most abundant RNA species in the cell and critical, catalytically active and predominant constituents of the ribosome, the main work horse of the cell. Eukaryotic ribosomes are composed of 80 ribosomal proteins and 4 rRNAs that build two subunits, large and small.

Detailed explanation-5: -rRNA is synthesized from mRNA within the nucleolus and its location, once assembled, can be found in the cytoplasm. In the nucleolus, there are encoded rRNAs. These encoded rRNAs are different in size and are referred to as large and small rRNA’s.