Question

Nucleolus is an irregular shaped structure found in the nucleus, which contains____.

a. DNA sequences encoding rRNAs
b. DNA sequences encoding histones
c. the nascent pre-rRNA transcripts and associated proteins
d. Ribosomal subunits in various stages of assembly
e. DNA sequences encoding tRNAs

Answer 1

The nucleolus is a structure found in the nucleus responsible for manufacturing the RNA needed for ribosome construction. It aggregates ribosomal RNA with associated proteins to assemble ribosomal subunits.

Step-by-step explanation:

The nucleolus is a darkly staining area within the nucleus that aggregates ribosomal RNA (rRNA) with associated proteins to assemble ribosomal subunits. It is responsible for manufacturing the RNA necessary for ribosome construction. The nucleolus contains nascent pre-rRNA transcripts and associated proteins.