LIFE SCIENCE

Detailed explanation-1: -In the nucleolus, ribosomal RNA is transcribed, processed, and assembled with ribosomal proteins to produce ribosomal subunits. The small ribosomal subunit is composed of ∼32 ribosomal proteins and an 18S rRNA.

Detailed explanation-2: -The nucleolus is a spherical structure found in the cell’s nucleus whose primary function is to produce and assemble the cell’s ribosomes.

Detailed explanation-3: -In the nucleus the dense region called the nucleolus is present which is responsible for the packaging and assembly of the proteins and form ribosomes.

Detailed explanation-4: -At the nucleolus, a long ribosomal RNA (rRNA) precursor molecule is transcribed from DNA, processed into three mature RNAs, and packaged together with specific proteins to make the large and small ribosomal subunits.