Question

an important organelle found in eukaryotic cells produces ribosomal subunits from proteins and ribosomal rna, also known as rrna. it then sends the subunits out to the rest of the cell where they combine into complete ribosomes. ribosomes make proteins, so this organelle plays a vital role in making proteins in the cell. what is this organelle? a b c d

Explanation:

The described organelle produces ribosomal subunits from proteins and rRNA, then sends these subunits to form functional ribosomes (which make proteins). This is the core function of the nucleolus, while the other options have different roles: centrioles aid cell division, lysosomes break down waste, and mitochondria produce energy.

Answer:

D. nucleolus